Is gold magnetic?

Search magnets for gold and silver: operating principle, review of models and prices

Treasures, treasures, hiding places, jewelry These words reek of adventure, adventurism, and romance.

Who didn't dream of finding treasures as a child?

Some adults have kept their childhood dreams and are making them come true by engaging in treasure hunting.

Like all passionate people, amateur search engines have their own clubs and communities. There they exchange experiences, discuss search devices, and make collective forays.

Modern devices for detecting metals help treasure hunters. One such device is a search magnet. More about it below.

Design and types

A search magnet is capable of finding, capturing and lifting metal objects whose weight is much greater than the device itself by 50-100 times. The device is otherwise called an eternal or powerful magnet.

The working fluid consists of a neodymium magnet (contains Nd-Fe-B) enclosed in a glass-shaped turned steel body.

The body is coated with zinc, and the body is coated with nickel, which allows to be used for searching in water .

The housing protects and shapes the magnetic field in the correct direction. There are:

1. Single-sided - convenient for searching from a boat, pier, bridge.
2. Double-sided - have a universal purpose.
3. Trawls are good for examining the bottom of reservoirs.
4. Rods – for narrow and hard-to-reach places for conventional magnets.

They also differ in body diameter and magnetic strength .

A special bolt (eye bolt) is screwed into the top or side, intended for a cable or rope.

The second function of the bolt is that it is used to remove an object from a magnet.

To do this, the eye bolt is screwed completely into the body, after which the magnetized object can be removed.

Search magnets are most afraid of high temperatures (above +80); when exposed to strong heat, they lose their functions .

It is easy to work with: having attached it to a rope or cable, it is simply lowered into the desired place.

Objects containing ferromagnetic metals will be attracted to the device. Together with a magnet, they can be removed to the surface.

The fundamental difference is that a metal detector can only indicate the location of an object, while a magnet allows you to immediately “get” it. However, a magnet will not help when searching in the ground . Therefore, these two devices in the seeker’s arsenal are designed to complement each other, but not replace each other.

Other distinctive features:

• the magnet retains its functions in an aqueous environment ;
• no need to buy batteries or accumulators ;
• absence of sound signals that attract attention or “declassify” the seeker;
• do not take up much space, easy to take with you;
• objects are attracted on their own ;
• affordable price;
• resistant to damage;
• long service life, provided that the operating rules are followed - they lose one percent of their strength in a hundred years .

Where can it be used?

Used to search for objects outside the field of view :

• in caves;
• mountain failures;
• wells;
• sewers;
• bodies of water;
• swamps.

A magnet will be a good help during archaeological excavations and searches for wartime items.

Usually used in tandem with a metal detector. Using a magnet, excess, unnecessary metal is collected, but which will be “distracted” when searching with a metal detector. The metal detector then searches for more valuable alloys such as gold and silver.

Objects that are made of metals that have ferromagnetic properties can be attracted by such a magnet. For example, cast iron or nickel.

Ferromagnetic properties are properties of base metals that allow them to “stick” to magnets with great force.

The burning question is, is it possible to lift objects made of precious metals using a magnet?

It is possible if the composition contains metals that react to magnetic attraction.

There is no special search magnet for gold and silver .

However, it is quite possible to obtain jewelry and coins made of precious alloys with its help, because they also contain other elements that the magnet will attract.

For example: 585 standard gold consists of 58.5 percent of gold. The remaining 41.5 percent comes from other metals, including nickel.

Nickel is easily attracted to a magnet. However, in order for such jewelry to be lifted, there must be a touch to the jewelry find.

It's the same story with silver. If the alloy has ligatures (metals added to jewelry to increase wear resistance), objects or jewelry will be attracted.

Review of popular devices and their prices

China is considered the leader in production . Approximately 130 enterprises in China produce neodymium magnets.

These products are manufactured in Russia

• scientific and production company "Supersistema", Moscow;
• ZAO NPO REDMAG, Kaluga;
• LLC "Plastic" in St. Petersburg;
• LLC "Research and Production Company "Magnites and Systems", St. Petersburg;
• Nepra company, Moscow region, Zheleznodorozhny;
• NPO "ERGA" in Kaluga.

Name	Diameter, mm	Height, mm	Breakout force, kg	price, rub.
Research and production company "Supersystem"
F80 (single sided)	48	10	80-90	690
F150 (single-sided)	68	15	170-190	1190
F600 (single-sided)	130	24	660-690	4290
Double sided F150x2	68	24	170-190 on each side	1940
Double sided F600x2	130	39	660-690 each side	7290
JSC NPO REDMAG
F300	94	28	600	3050
F600	136	25	600	5450
Made in China (according to information from the Polyus-magnet online store)
F300	94	28	300	2750
F400	116	20	400	3200
F600	136	25	600	4900

As in any serious matter, caution is important :

1. Ask the people you are going on search trips with to see if they have pacemakers . The device can disrupt the normal operation of the pacemaker.
2. Credit cards with a magnetic stripe, mechanical watches, hearing aids and telephones should be kept away from the magnetic device.

Easy to use and maintain, affordable, these devices can help with:

• searching for gold and other precious metals;
• when digging non-ferrous metal and ferrous metal.

There are practically no restrictions on the place of application. At the same time, they are durable and do not lose their properties.

If the operating rules are followed, search magnets will help in searches for a long time.

Source: https://rcycle.net/metally/dragotsennye/poiskovye-magnity-na-zoloto-i-serebro

How to check the authenticity of a gold item at home

There is no mark on a gold item, but you doubt whether it is gold? It is not difficult to check gold for authenticity; fortunately, there are many ways to do this.

Magnet

Just like silver, gold is not magnetized at all. If a gold product sticks to a magnet, this indicates that it is made of a completely different metal, low-grade gold, or simply coated with a layer of gold.

If a golden thing is not attracted even by a very powerful neodymium magnet, we can more or less confidently say that it is made of gold.

Lines

On unfired ceramic tiles, a gold object will leave a thin golden line. Products made from other metals that look like gold, if passed over unfired ceramics, will leave either gray or black marks.

Aurally

If you have a keen ear for music, you will definitely notice the difference in sounds when a gold ring and a fake ring fall on a glass surface.

Vinegar

A product that needs to be checked for authenticity should be immersed in a container with vinegar for a couple of hours.

Fake gold will certainly be covered with a layer of oxide and, as a result, noticeably darken.

A real object made of gold will not change in appearance in any way.

Bread crumb

Roll the jewelry into the crumb of fresh rye bread. After two or three days, break the stale piece of bread and remove the decoration from it.

Traces of oxidation on a gold item will clearly indicate that this “gold” is not gold at all, since oxidation processes are not familiar to real gold.

If, after being in the bread crumb, the item is completely covered with a green coating, get rid of such decoration as soon as possible - it is made of polished copper.

Optical method

Compare how the test sample plays in shades in the sun and in the shade. For a product made from real gold, the color scheme will be absolutely the same whether in the sun or in the shade.

Fake gold in the shade will look much darker than in the sun.

We do not suggest checking the authenticity of a gold item with nitric or hydrochloric acids or experimenting with aqua regia and reagents, due to the danger of such activities.

Let professional jewelers do this. It is to them that you turn for a final and comprehensive conclusion about the authenticity of the gold product.

May your gold always be genuine and real! Good luck to you!

Source: https://goodmaster.com.ua/dom-i-kvartira/kak-proverit-zoloto.html

Can gold be magnetic? How to determine its authenticity using a magnet?

Can gold react to a magnet? The answer to this question lies in the properties of metals, their alloys and physical characteristics. Why are some materials able to be attracted to a magnet, while others, on the contrary, do not react or even repel it?

Paramagnetic substances are found in nature - substances that can become magnetized when exposed to an external magnetic field. These include ferric chloride, platinum, tungsten, sodium, etc. All of them belong to the group of weakly magnetic materials. Their atoms are capable of changing their position under the influence of an external field. They are attracted to it, but if there is no field, the paramagnetic does not become magnetized and remains at rest.

The property of paramagnetic materials to attract each other appears only at low temperatures. In more comfortable conditions, magnetism appears in such metals and alloys as:

• nickel;
• iron;
• cobalt and others.

Materials that can change the magnetic field are divided into:

• hard;
• soft;
• magneto-optical;
• thermomagnetic.

There are also materials that are capable of changing their size and volume when exposed to a magnetic field.

In addition to paramagnetic materials, there are their opposites - diamagnetic metals and alloys, which will not exhibit magnetic properties under any conditions. This is due to the fact that there is an even number of electrodes on their outer shell.

Physical properties of metals

Metals and alloys are characterized by the presence of atoms that do not change their state and position under any conditions. The same applies to gold. Its physical properties are determined by the presence of free electrons, between which a metallic bond occurs. It defines their main characteristics:

• shine;
• plastic;
• conductivity of electric current;
• magnetism.

The latter indicator allows the use of raw materials in radio and electrical engineering.

Gold can be magnetic under certain conditions:

• it contains impurities that react to a magnet;
• the product is simply covered with a layer of gold, under which there is a paramagnetic material;
• gold is present in the alloy in a small proportion, and the rest is made up of metals that react to a magnetic field.

With the advancement of technology, the fact that the precious metal is not magnetic has been questioned. Several years ago, a group of scientists from Australia and Japan conducted an experiment. By chemical means, the properties of gold were changed, and its atoms acquired the ability to be magnetic. In a similar way, you can change the physical parameters of other diamagnetic metals and alloys.

Traditional methods of testing gold for authenticity

Changing the properties of metals is practiced only in the scientific community, but in jewelry it is customary to use real raw materials, which are tested using classical methods. When a product is exposed to a magnet, the result should be negative, i.e. the metal will not be magnetic. If the jewelry reacts even slightly to the magnetic field, it means that this is a fake or the amount of gold in the alloy is negligible.

As you can see, you can check whether the gold in front of you is real or fake in a fairly simple way, but not always. If unscrupulous manufacturers use aluminum or copper for manufacturing, the product will not respond to a magnet. In this case, you need to contact a specialist and conduct an examination.

Source: https://1nerudnyi.ru/mozhet-li-zoloto-magnititsya-10/

Search magnet for gold and silver and its properties

Typically, powerful magnets are designed to find precious metals. A search magnet reacts to gold and silver quite strongly, and although it is difficult to find them in their pure form, its power is enough to pick up jewelry and coins from the ground. The main goal of all search engines is treasures, expensive coins, and sometimes just ferrous metal.

The article will describe the structure of the magnet and the basic principle of operation. He will also figure out what exactly can be found with its help and how to find expensive alloys. It will be explained in detail what ferromagnets, paramagnets and diamagnetic materials are. In addition, valuable tips and recommendations will be given that will greatly simplify the search for valuable items.

Search magnet device

This device consists of a steel case, inside of which there is a neodymium magnet. It is made from a rare alloy containing neodymium, iron and boron. This compound has a powerful attractive property. Despite its compactness, it is capable of holding things tens of times its own weight.

To make it easier to get various things, the case is equipped with a special mount. It is screwed into the magnet body via a thread. On top of the fastener there is a fastener in the form of a hook or loop that will hold the cable or rope. This mount has a rigid base that is firmly screwed into the body. The entire structure has a reliable foundation, and in this case, there is no fear in lifting any expensive and heavy thing.

Principle of operation

The search magnet has rather poor functionality. The main task of such an object is to attract as many metal objects as possible. But the device copes with its main task more than well. Thanks to its unique design, it has great strength and is able to hold quite large objects, as well as objects containing gold or silver, which ordinary magnets cannot handle.  

This is especially convenient when getting things out of wells, funnels and various pits. It's also good to use this thing underwater. In water, all objects are subject to great resistance, and picking up any object becomes a rather labor-intensive task. But with a neodymium magnet, searching and removing such objects is greatly simplified.

What items can be found

When asked what kinds of things can be found using a search magnet, iron objects, including coins, immediately come to mind. Almost all paramagnetic metals can be found. Simply put, materials that are attracted to the magnet body, but more on that later. Such coins, or precious metals, can be of great value. For example, you can find iron coins from the period of Tsarist Russia, as well as many rare Soviet coins.

Powerful magnets can attract metals such as:

• aluminum
• copper
• tin
• brass
• lead

Most searches are carried out in attics, in various beaches and public places where people can lose things, as well as in wells and pits. In such places they usually find costume jewelry, expensive jewelry, various metal boxes, and sometimes even expensive mobile devices (on the beach). This is what finding things on land is all about.

As for water, you can also find many valuable things, including gold jewelry. Also, thanks to superstitions, a whole fortune of coins can be raised from the bottom. Moreover, there is no need to get coins from city fountains, since there are quite a lot of abandoned wells that no one needs, but they store precious things.

Does a magnet attract gold and silver?

Is it possible to find pure gold or silver with powerful magnets? No, since such metals are diamagnetic, that is, they are not attracted to magnets. But it's not all bad, thanks to all the power of neodymium alloy, it is possible to get some jewelry. Such objects usually have a ligature in them.

This alloy helps precious metals such as gold or silver acquire certain properties. For example, silver jewelry does not darken as much, but gold jewelry is more durable. But the most important thing is that the ligature allows magnetization and makes it possible to find various alloys.

But it is also possible to find pure gold or silver. At the beginning of the article it was said that iron boxes can be found. Typically, jewelry made of gold or silver is stored in such cases. So, walking through an attic or similar places, you can get rich, in the literal sense of the word.

Magnetic properties of various metals

In order to go hunting for valuable metals, you need to know what exactly will be attracted to a magnet. Since metals have different magnetic properties, and some do not have them at all. They can be divided into three groups:

1. ferromagnets

2. paramagnets

3. diamagnetic materials

Ferromagnets are metals with some of the best magnetic properties. Such metals are highly magnetic. These include ferrous metal.

Paramagnetic materials have the usual properties; they are readily attracted to a magnet, but do not have the function of magnetization. These include some alloys of jewelry and several types of non-ferrous metals.

And finally, diamagnetic materials. Such alloys are extremely difficult to respond to magnetic fields and greatly complicate the search for truly precious things. Diamagnets include gold, silver, aluminum, patina and other metals that even the strongest magnet does not pick up.

Is it possible to find gold with a magnet?

As already discussed earlier, jewelry and coins with gold can be lifted, but it is very problematic.

It is impossible to get pure gold with a magnet.

But if various factors are favorable, such as an iron box or paramagnetic jewelry lying nearby, then there is a chance to find it. Basically, only jewelry containing gold, such as bracelets, earrings and rings, can be caught with a magnet. The best places to search are sandy beaches, wells, and the sea or river bottom where a large number of people swim.

Source: http://lombardyinfo.ru/stati/poiskovyj-magnit.html

Why is gold jewelry magnetic?

To understand why gold jewelry is magnetic, you need to understand what and how it is created. Gold is a special metal with unique properties. This material is resistant to acids and oxidation processes. Although gold is very dense, it is still quite ductile. Therefore, when creating jewelry, in addition to the described metal, other materials and alloys are used, which give the jewelry strength.

If the alloy with gold includes silver and copper, the product will not respond to a magnet. If jewelry is susceptible to the influence of a magnetic field, it means that the alloy contains metals that are attracted by a magnet. Based on this, we can assume that the product is ordinary jewelry.

Features of interaction

The peculiarity of pure 999 gold (one thousand grams of the material contains 999 grams of precious metal) is that it does not interact with a magnet. If you put a magnet near a gold bar, the metal will not be attracted to it.

It is worth noting that gold alone is never used to make jewelry. This is due to the fact that the metal in its pure form is incredibly ductile and very brittle. Therefore, pure gold is not suitable for long-term use as jewelry.

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In this regard, the jewelry industry uses only alloys that contain, in addition to the base metal, other materials to make precious jewelry more durable.

Note! An alloy containing gold will be strong enough if metals such as nickel, silver, palladium, copper, platinum or zinc are added to it.

There are several types of metals that are easily attracted to a magnet, namely:

• gadolinium;
• iron;
• cobalt;
• nickel;
• steel;
• alloys of the listed metals.

However, there are some metals that are poorly attracted to a magnet, including aluminum and copper.

As for bismuth, gold (both yellow and white) and silver, they do not react to a magnet at all, or even, on the contrary, repel it from themselves. In this regard, we can say with complete confidence that real gold jewelry, which was made from high-grade metal, will under no circumstances come into contact with a magnet.

Gold will not react even to a search magnet. Such a device can only be used as additional equipment in the search for precious metals. Using a search magnet, you can clear the area under investigation from metal debris to make it easier for the metal detector to detect gold or other metal.

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This is explained by the fact that a high-grade alloy must have a purity of no less than 585, where 58.5% is pure gold, and the remaining 41.5% belongs to copper and silver. In this combination, metals will not be affected by the magnetic field (copper reacts weakly to a magnet, and silver and gold do not magnetize at all).

Advice! Considering the above, experts recommend using a magnet to check the authenticity of jewelry at home.

Why is gold jewelry magnetic?

The reason that gold jewelry is magnetic is that the product contains an element that is susceptible to the influence of a magnetic field. If the gold has a 585 standard (or any other), but it is attracted to a magnet, therefore, the jewelry is a fake, containing cobalt, iron or steel.

Sometimes fake jewelry is made entirely of copper, so it reacts poorly to the influence of a magnetic field. Therefore, counterfeits are often made from copper, and in order to give the product an appearance like gold, the product is coated with a layer of gold plating. Also, such “jewels” may indicate the purity, but upon first checking for authenticity, it turns out that this decoration is ordinary costume jewelry.

The most common alloys from which fake jewelry is made are:

• aluminum bronze (10% consists of aluminum, the rest is copper);
• platinum (the alloy mainly consists of copper, and also includes a small part of zinc, nickel, silver and platinum);
• goldin (an alloy of aluminum and copper);
• bartbronze (contains tin and bronze in equal proportions).

If you find that the jewelry is susceptible to the action of a magnet, you should seek help from a specialist who can assess the authenticity of the jewelry.

Note! The home method of checking precious jewelry using a magnet will not give a 100% guarantee that the result obtained is correct.

Source: http://inzoloto.ru/investicionnye-monety/pochemu-magnititsya-zolotoe-ukrashenie

Good advice on how to distinguish gold from fake

Today you can find a lot of fake jewelry. How to distinguish gold from fake so as not to become a victim of scammers? There are many effective ways. The most reliable method is to check with a specialist. If he is not nearby, then there are some useful tips from jewelers.

Ways to recognize fake jewelry

First you need to consider the jewelry. It must have a special marking that is responsible for the authenticity of the gold. The hallmark or carat weight must be stamped. To facilitate inspection, it is advisable to use a magnifying glass. It is not always possible to distinguish the mark on antique metal. In the modern world, they have learned how to test gold on fake gold, so this method is not always successful.

Over time, the gold plating wears off. You need to look at the edges of the product. If other metal is visible in the areas of wear, the item is not entirely made of gold.

Checking the product for bite

Previously, films were often shown where gold coins were tested for their “tooth”. And for good reason. After all, this way you can check not only coins, but also gold jewelry. For example, a ring or earring. The product must be pressed with your teeth. Now look at him. Real gold will leave teeth marks. The deeper the bite, the higher the test. However, we must not forget that lead is very soft, so it will also leave traces.

Ceramic check

Fake gold is easy to detect using this method. This test must be carried out very carefully as it is easily scratched. To do this, you will need an unglazed ceramic plate, that is, not covered with anything. Swipe the gold over it with light pressure. What is visible? The gold stripe is a natural product, the black stripe is a fake decoration.

Magnetic check

First you need to purchase a magnet. The one that hangs on the refrigerator is very soft and is not suitable for dough. The magnet must be a real, heavy one that interacts with the metal. Gold is never attracted.

Therefore, feel free to bring the jewelry to the magnet. If she is attracted, then you are holding a real fake. There are cases when a magnetically passive component is added to a product. Then you can confuse gold with a fake.

How to distinguish gold in such cases? Try the following method.

Application of nitric acid

Nitric acid will help identify fake gold from real gold. To do this, place the product in a metal container without stains. Next, you need to drop nitric acid from a pipette onto the product. If the gold changes color and becomes greenish, then you are conducting an experiment with ordinary metal. The gilded product takes on a milky hue. If the gold is real, then no reaction will take place.

Sound test

If you take a gold item and throw it onto the surface of the table, then the real metal will ring loudly, like crystal. For such an experience, rings, earrings, but not long jewelry (chains, bracelets) are suitable.

Vinegar test

Pour some vinegar into the container and place the decoration there. Nothing bad will happen to real gold, but fake gold will darken in two minutes.

Iodine test

Iodine is a very good test for the authenticity of jewelry. To do this, you only need to apply one drop to the inside of the product. Gold will remain unchanged. The fake decoration will darken. It can turn either light gray or black.

Any chemical testing is possible only on the surface of the jewelry. The inside is checked when a person is ready to destroy the product.

You can also ask experts how to distinguish gold from a fake, who will help you quickly and using several ways to determine whether the jewelry is real. Gilding is almost real metal.

Determining gold plating

Many consumers are interested in: “how to distinguish gold from gilding?” With the slightest knowledge this is not difficult to do. Usually gold plating is not tested. The gold alloy will not be able to lie on top of the metal. Only real noble metal will fit.

If you see a product with hallmarks: 585, 750, 350, 500 - this is gold with added impurities. Pure precious metal can have only one hallmark - 999.

If gold foil was used, then they can use a different test than those used on real metal.

Important! A sample does not always guarantee the authenticity of a product. Sometimes small scratches can be seen. Often this means that the item is not entirely gold, but only a clasp on or near the item. Everything else may turn out to be gold.

To check the jewelry yourself, you can lightly scrape the product in an inconspicuous area. The gilding will come off slightly, but the gold will remain unchanged.

A lapis pencil is also suitable for checking. It is sold in any pharmacy. The scraping area must be moistened with water and drawn over it with a pencil. Any metal other than gold will darken.

A simple experiment can be done to test gold. Turn on the burner and heat the product over it (300-400 degrees). Then quickly throw it into cold water. Gold will not change, but stains will appear on other metals.

You should never purchase gold from dubious establishments and stores. These should be specialized jewelry departments, where there are quality certificates and specialists work. After all, some unscrupulous sellers refer to the fact that samples are not taken abroad. You can't believe this. Any import of gold jewelry is not permitted without a stamp and relevant documents.

Sometimes you come across products that have the 583rd mark on them. Many people don't know about it. These jewelry were made in Soviet times and fakes of such products are extremely rare. Therefore, if you come across a 583 sample, do not be alarmed.

Recognizing copper

The famous scientist Aristotle believed that the best way to distinguish copper from real gold is to taste both. If you drink water from a metal cup that contains copper, it will taste metallic. The golden cup does not give off any taste.

Copper tends to oxidize when interacting with oxygen, that is, in air. Therefore, unlike gold, it will darken over time.

Imitation gold

A variety of alloys are used for fake gold jewelry.

Aluminum bronze, which resembles gold in color. This alloy consists of 90% copper and 10% aluminum.

Aluminum bronze coin.

Belgica is an alloy similar to platinum. It contains about 74% iron, approximately 16% chromium, and almost 9% nickel.

Mosaic gold, which includes almost 70% copper and 30% zinc. Gives a hint of native gold.

Tompak - this alloy is very similar to real gold. It is often brought by tourists from Turkey, Israel or China. If you don’t know how to distinguish gold, it’s better not to buy it in these countries.

There are a huge number of such alloys. Thanks to such materials, they learned to imitate real gold. Most often it is transported through smuggling. Counterfeiting gold is a very common phenomenon. Try not to fall into the “trap”.

How to avoid fraud?

To avoid buying a fake, you need to follow simple rules.

You should not buy gold jewelry from traders in markets or dubious stalls where there are no appropriate documents. Sellers very often offer fakes.

Don't trust your intuition, because it can fail you at the most inopportune moment. Don’t think that a product is too cheap - this does not mean that it is of high quality. Gold must be hallmarked, even if it is made to order.

Do not buy jewelry that contains an alloy of titanium and gold. In appearance they resemble 585 gold, but most likely they do not contain precious metal.

If a product has a hallmark or a tag hanging on it, this does not guarantee the yellow metal content. A poorly versed consumer will not always be able to distinguish a fake even with the help of numerous experiments.

If a buyer knows the real price of a product and suddenly sees the same thing, but cheaper, this does not always mean that it is a fake. It is necessary to pay attention not only to external data, but also to size, weight and manufacturer. It is from this data that prices vary. You can also end up with a high-quality fake, which is extremely difficult to distinguish from real precious metal.

Every jewelry professional has special equipment that can be used to determine the quality and price of the metal. Of course, the easiest way to find out how to distinguish gold from copper, for example, is advice from a professional. Even if the service is paid, the person will be confident in the authenticity of the jewelry.

Source: http://golden-inform.ru/prochee/kak-otlichit-zoloto-ot-poddelki/

Why is a gold chain magnetic: is testing with a magnet reliable?

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It is not by chance that gold, or rather alloys based on it, is called a precious metal. However, in appearance it is easy to confuse it with other yellow metals that are resistant to corrosion. Unscrupulous craftsmen take advantage of this. How not to make a mistake? I heard about magnet testing. Indeed, some chains were attracted to him! But is this good? We need to figure it out!

Gold chain is magnetized: reasons

Testing the products will tell you their composition. For jewelry, alloys are used that range from 37.5% noble metal (pale yellow metal) to 75% (white gold). Silver in the alloy is from 5 to 15%, palladium from 3.8 to 20%, the rest is copper.

Important! All these metals have diamagnetic properties and do not react to a magnetic field. Chains made of certified alloys are not attracted.

There are messages on social networks and forums about such properties of the fastener. This is due to the use of a spring latch made of special carbon steel. Jewelry compounds are too plastic and cannot be used to make a good castle. It will quickly fail. If the chain itself is not magnetic, the product can be purchased.

Why is the chain magnetic?

Experts give two reasons why a chain might stick to a magnet.

• A gold alloy with nickel or cadmium is used . In some countries they are used to make thick stamped chains;
• This is gold plated jewelry . Modern methods of hot application of protective coatings are effective. In this case, a strong film is formed that adheres to the base at the molecular level.

By the way, high-quality gilding of 20–40 microns can withstand chemical testing; only a jeweler can identify a fake .

Is it possible to use a magnet to check the authenticity of gold?

When going shopping for jewelry, some buyers find it necessary to take a magnet with them. In some cases, it helps to identify a fake. Testing is not difficult; it does not indicate the authenticity of the chain.

Important! Experts do not recommend relying completely on a magnet.

Non-ferrous metals that are not attracted

There are non-ferrous metals that look like gold, consisting of elements that do not have special properties.

• goldin, an alloy of copper and aluminum, to make professional jewelry .
• Tin or butt bronze , multi-component copper-based compounds, have a light yellow color with a subtle greenish tint.
• Some copper-zinc alloys are created specifically for creating jewelry that is resistant to oxidation and retains its appearance for a long time. These include Hamelton metal, Mannheim, French, mosaic, Turkish, and English “gold”.
• Durametal , a ductile alloy with aluminum, is equally popular in industry and jewelry.
• Tompak, a copper alloy alloyed with nickel and other paramagnets , is often used by jewelers to make counterfeits in Israel, Italy, China, and the United Arab Emirates.
• Platinor contains only 18% platinum, the main component is copper, it contains up to 57%, the remaining alloying components are silver, nickel, zinc.

All these alloys amazingly imitate different types of hallmarked gold.

Important! A magnet will not help to identify products made from them, so such testing does not give 100% results in identifying counterfeits. Additional testing is needed.

Many of the listed alloys are used to apply gold-like coatings to copper products, which are passed off as inexpensive imported jewelry chains, rings, and earrings.

How not to make a mistake and not overpay for the alloy as if it were a jewel? Now we know that color and neglect of the magnet are not an indicator. This means that we buy jewelry only from a trusted seller, in a reputable jewelry store. And we don’t hesitate to ask for a certificate.

We wish all your jewelry to be real!

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Source: https://tkaner.com/aksessuary/tsepochka/pochemu-zolotaya-tsepochka-magnititsya/

Are there search magnets for gold, silver, copper? (answer: NO)

Only steels have magnetic properties , and not all of them. For example, austenitic stainless steels do not attract magnets because they do not have ferromagnetic properties. However, there are a sufficient number of enthusiasts who believe that magnetic waves are emitted by any metal, and therefore there should be a search magnet for gold and silver, and for some this expression is quite normal for perception and practical use.

ATTENTION! MAGNETS FOR SEARCHING GOLD, COPPER, SILVER DO NOT EXIST!

THEY SIMPLY ARE NOT - ANYWHERE!

In our article we describe the theory of how non-ferrous and precious metals can be detected using magnetic fields. This article is our fantasy, supported by scientific developments of foreign scientists.

See also the article - Extraction of scrap metal from water (about ferrous metal and search magnet).

Device for adjusting the magnetic field from metal objects

Strictly speaking, this is not a magnet, but rather an electromagnet, with the help of which you can initiate and configure any magnetic radiation, even quite weak ones, to be captured by appropriate devices. It is not easy to build such a device, but the authors, citizens of Australia, have no doubt about its effectiveness.

That's why they patented their invention in their patent office. Based on the fact that Australian soil is not much different from domestic soil, we will give a description of the device and operating principle of such a magnet for gold and silver.

Although it is necessary to repeat - in the generally accepted sense, this design has nothing .

The operation of the device is based on the well-known physical fact that when any object that generates magnetic oscillations in an alternating electric field moves, changes occur inside the trapper circuit associated with the movement of atoms around the nucleus.

If the area of ​​electric field generation is sequentially moved along or across the magnetic field from a metal object, changes will occur in this area, the intensity of which determines the degree and strength of the interaction of two fields - magnetic and electric.

The difficulty is that strong magnetic fields are not created by noble metals . It is known, for example, that, according to the principle of decreasing, the electrochemical potentials of non-ferrous metals are located as follows (we consider only the area of ​​interest to us): copper → mercury → silver → palladium → platinum → gold.

Thus, if the expression “is copper attracted to a magnet” may still have some basis, then the phrase “magnet for gold” does not make any sense at all.

It is more correct to talk about an electromagnetic trap, which will record the fact of a coordinated change in electric and magnetic fields in a certain, rather local, metallic volume.

how copper interacts with a magnet:

Recording of changes that occur in the apparatus under the influence of such fields is captured by the measuring circuit. It is a highly sensitive spring made of rhenium, a rare metal that is absolutely insensitive to temperature changes. The rhenium spring must be adjusted to operate.

  The process is to set the conditional zero of the device, for which it is placed as far as possible from all metal objects. In urban areas, such a “search magnet for gold, silver and other precious metals” will not work. However, search engines are much more likely to look for gold, platinum, copper, silver, etc.

in old abandoned rural estates

With any movement of the device, a similar action occurs with the electric field, while the magnetic field remains constant in coordinates. Therefore, the resulting movement of the spring will also be different.

Where it turns out to be most intense, its source is almost certainly located - the magnetic field. Another thing is that this kind of search magnet for non-ferrous metals will not be able to show which metal is hidden under the thickness of wood or earth.

But the device will definitely show that there is metal there.

Any metal can be detected by a magnetic field

The principle of operation of such a pseudo-magnet is similar to the coils of a metal detector, with the only difference being that the “magnet” will be tuned to only 1 metal and this is in theory - but we don’t know how it will behave in practice, BUT, most likely, it’s cheaper, faster and simpler will use an ordinary metal detector to search for non-ferrous metals, since not a single wizard has yet invented a magnet for non-ferrous and precious metals, maybe because there are no wizards!

How to assemble and set up

It will be very difficult to find/buy a rhenium spring, but all other parts of the device are quite accessible for making yourself. The sequence is:

1. A steel axle is made from a thin-walled steel pipe with a diameter of no more than 16 mm. Its length should not be less than three diameters, otherwise the change in the magnetic field cannot be detected.
2. A frame is made from thin copper or brass wire. The authors do not describe its dimensions, but, based on the dimensions of the tubular axis, it should be at least 200x200 mm. The frame must be sufficiently rigid.
3. Three (as many as possible) holes are drilled in the tubular axle at equal distances, in which the wooden axles are placed.
4. Thin-walled wooden disks are made, the number of which must correspond to the number of holes drilled in the axle. Obviously, discs can also be made of plywood: what matters is the mass of the disc and its absolute immunity to magnetic fields.
5. The central sectors of each disk are covered with metal foil made of the metal that will be searched. Thus, a search magnet for non-ferrous metals - copper, gold and silver (platinum is searched for much less frequently) should have three sets of replaceable wooden disks.
6. The frame with disks must be able to move freely along the entire tubular axis with fixation in a certain place. If the fits of the mating parts are made with the required accuracy, then there should be no swaying of the frame when it moves.
7. To create a magnetic trap, plates from an old transformer are used, which are packed into the frame outline. The distance between adjacent plates should not exceed 1.5 mm in thickness and 56 mm in length. Such plates form the screen of the device that perceives magnetic radiation.
8. Next, assemble the magnetic coil. You will need a solenoid made of 600 layers of enameled wire, which is connected to an alternating current voltage source. The winding should be multilayer, this will reduce the parasitic capacitance of the coil and make the device less inertial.
9. A ferromagnetic or - which is better - a ferroelectric core is inserted inside the coil.
10. By connecting this structure through a step-down transformer, a constant position of the frame with the plates is achieved relative to the wooden disks. This will be the conditional zero of the search “magnet” for non-ferrous metals.

The easiest way to check whether a search “magnet” attracts gold and silver is on a real object made of these metals. At the same time, it will be possible to establish the practical sensitivity of the device.

about how a search magnet does NOT magnetize gold, silver and other coins

Source: http://xlom.ru/poisk-metalloloma/sushhestvujut-li-poiskovye-magnity-na-zoloto-serebro-med/

12 ways to check gold for authenticity

iPhones are iPhones, but there are also more eternal values. How to check whether they are offering you real gold or a cheap fake? You can’t drown him in royal vodka!

We tell you how to avoid being deceived when buying gold and how to check its authenticity.

1. Look at the sample

Factory products always have a standard stamp with a hallmark. Fineness is the number of grams of pure metal in the alloy; the lower it is, the worse the quality.

According to Decree of the Government of the Russian Federation dated May 6, 2016 No. 394, all alloys in which more than 30% of the weight is precious metal must be stamped with hallmark. Standard samples for gold are 375 (lowest), 500, 583, 585, 750, 916, 958, 999 (highest - only 1 g of impurities per 1 kg of metal).

In the USA and Canada, carat hallmarks are used (9 carats correspond to the 375th hallmark, 24 carats correspond to the 999th). Moreover, the letter K next to the numbers means that the product itself is gold, and KGP means that it is plated with gold (karat gold plated).

In Belgium, gold samples are designated by numbers: 1 – 833, 2 – 750, 3 – 585. A similar system works in the Czech Republic and Slovakia: 0 – 999, 1 – 986, 2 – 900, 3 – 750, 4 – 585.

Examining a sample is often difficult. Use your smartphone in macro mode, then enlarge the photo and look at the sample in detail. The mark should not be crooked or blurry. This is, if you like, a passport of the product, so they are very careful when applying it.

2. Smell the product

Gold items should not have a smell. Even silver has a characteristic metallic smell, but gold does not.

3. Take a closer look at the joints

On bracelets or chains, you can often notice a difference in color between the metal of the link itself and its joints. This is because when soldering gold, they use solder of a higher standard - it melts more easily.

If you see a difference in color, everything is OK, the gold is real. If not, you should carefully check the product in other ways.

4. Attach a magnet

Plating steel or other alloys with a high iron content with gold or its imitation is a common practice. Only ferromagnets are strongly magnetic - iron, cobalt, nickel, gadolinium, terbium, dysprosium, holmium, erbium, thulium.

Dimagnets (for example, water or table salt) and paramagnets (aluminum, etc.) are weakly magnetic. All non-ferrous metal is not magnetic.

If it happens on the beach or in places where tourists gather, buy the cheapest magnet in a souvenir shop and attach it to the product. If it sticks, it’s definitely a fake or the metal is of too low standard (too many iron impurities). If not, perform other checks.

5. Test with vinegar

Tell the seller that you will test the gold with vinegar. Are you nervous? There’s no need to run to the grocery store anymore. But a professional who is confident in his product will not sweat it.

Fake gold quickly darkens in vinegar - just pour a little into a glass and hold the metal in it for about five minutes. But real high-grade metal doesn’t care about anything.

6. Drop some iodine

Rub the product on jeans or other thick fabric, then drop iodine on this place on the metal. High standard gold does not darken. If the metal has darkened (this may appear within a minute), the product is not genuine or the standard is not too high.

But brass and copper do not change color from iodine either. So this testing method is good for high-grade gold, but it is not enough on its own.

We do not recommend testing products with iodine levels of 585 or lower. After iodine, you will definitely have to polish them or remove stains with ammonia; traces may remain.

7. Draw with lapis pencil

A lapis pencil is needed to stop the bleeding. This is an antiseptic based on silver nitrate, it can be bought at a pharmacy, it costs about 100-150 rubles.

To check the authenticity of gold, soak the item in water. Then, using a lapis pencil, draw a small line over the wet one and wipe it off.

Lapis does not react with gold, but does react with other metals. If a trace remains, then the gold is fake or of very low standard. Nothing will happen to genuine metal.

8. Look for gold in the sun and shade

Objects made of real gold shine equally strongly both in the shade and in direct sunlight. Admire the product in different lighting.

If in doubt, take an object that is definitely made of gold and compare the intensity of the shine.

9. Test with black bread

The method is safe (for real gold!), but slow. Take the crumb of black bread, remember, mix with water and stick the mixture onto the product. Leave it until the bread crumb turns into a dry crust, then break it apart.

If there are dark traces inside the crumb, it means the fake has oxidized. If not, then it is either gold or good gilding.

10. Run gold over tile or unglazed porcelain.

On unfired ceramic tiles or porcelain that is not glazed, gold will leave gold marks. After counterfeiting, the marks are gray or black.

Just draw with inconspicuous parts - fasteners, fasteners, so that it is not so noticeable. Gold may leave no traces at all on fired tiles.

11. Go to a pawn shop

In the pawn shop there are professionals who have an eye for gold. Invite the seller who wants to sell gold off his hands to go there with you - they say, let them evaluate the product.

The service costs 500 rubles, rarely more. But if you pretend to be a potential client, you can get an estimate for free (then you’ll pretend that you’ve changed your mind about selling).

12. Go to a jeweler

Jewelers not only determine the quality of gold items by eye, but also have special instruments for this. For example, a device with the otherworldly name “DeMon-U” will not only distinguish real gold from a fake, but will also indicate the sample.

The check will cost a maximum of 1000 rubles, often less.

Don't try it on your teeth!

Gold is a soft metal, so if you squeeze it hard with your teeth, marks will appear. Agree, the seller will not like it and will force you to buy.

Athletes test their medals for the sake of photos. Moreover, gold medals are actually just gold plated.

By the way, fake aluminum behaves exactly the same way, so if the seller insists on a “teeth test”, don’t be fooled.

On the other hand, only a new product does not have even small scratches on the surface. If a person claims to be selling his used gold, but it appears to have only come from a factory, something is wrong here.

conclusions

If you buy gold secondhand or from an unverified store, use as many methods as possible to ensure the authenticity of the product. The main thing is not to try too hard, so as not to spoil the soft metal.

post:

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Source: https://www.iphones.ru/iNotes/12-sposobov-proverit-zoloto-na-podlinnost-07-08-2018

The difference between real gold and fake gold

Paradoxically, jewelry stores are growing like mushrooms after rain, although gold mining is falling all over the world. Alas, even in a seemingly decent store, you can run into a fake that will cost no less than a real gold item. To avoid becoming a victim of scammers, you need to approach the purchase of gold jewelry carefully, checking the item you are purchasing in all available ways. What these methods will be discussed now.

articles

A real gold item is unlikely to be sold in an underground passage or just on the street. In this case, it is easier to take it to a pawnshop.

But even purchasing jewelry in a store does not guarantee its authenticity. Each gold piece of jewelry must have a list of certain documents, one of which is a tag. It should reflect information about the manufacturer, the name of the product and its article number, sample, weight, price per gram and total price, quality control stamp.

Try

When buying gold jewelry, you need to remember that it is not one hundred percent gold metal, otherwise it would easily bend, since gold is soft. Therefore, the sample that can be seen on the inside of the product is nothing more than the amount of gold in it. That is, a sample of 585 means that this product contains 58.5% gold, the rest being impurities. If the sample is blurry, or you doubt what numbers are indicated there, refuse to purchase.

Unfortunately, even gold samples can be faked, so there are several more “old-fashioned” verification methods that, although not entirely accurate, can help.

Experimental methods for determining authenticity

When struck, gold produces a characteristic “crystal” sound. But a jewelry store is unlikely to allow you to use this method.

There is another option - drop a drop of iodine on the product and wait three minutes. If a trace remains, the jewelry is fake.

Gold jewelry cannot be attracted to a magnet, unlike other metals. True, aluminum, bronze and copper are also not magnetic, this must be taken into account.

Another way is to put gold in vinegar essence. It should not darken, unless, of course, it is a fake.

And finally, gold jewelry does not change color when viewed in the shadows or in the light.

But the main and most reliable way is laboratory examination. If after all the experiments your doubts have not been dispelled, contact an independent specialist.

Conclusions TheDifference.ru

1. Gold jewelry has all the documents, hallmarks and hallmarks, while a fake piece may lack some of the above.
2. Gold rings if dropped from a small height.
3. No traces of iodine can remain on real gold jewelry and it will not be darkened by vinegar.
4. Gold is not attracted to a magnet.
5. Both in the shade and in sunlight, the gold jewelry should have the same color.

Source: https://TheDifference.ru/kak-otlichit-nastoyashhee-zoloto-ot-poddelki/

Search magnet for gold and silver: how to magnetize metal

Many companies offer to buy a search magnet for gold and silver. Every person at least once in his life dreamed of finding a treasure. We need to figure out whether it is possible to attract precious metals to a regular magnet?

Magnetic field and metals that conduct it

At the macroscopic level, under the influence of a magnetic field, some substances can be attracted. This also applies to metals and alloys. When hanging a new magnet on the refrigerator, many people don’t even think about why it doesn’t fall off.

The most attracted metal is iron, which is used in alloy with other metals in the production of refrigerators. Now try attaching a gold ring or chain to this magnet. In this case, the gold product will not hold up.

If you perform this trick with a silver item, you will get a similar result. Gold reacts worse to a search magnet than silver, since the latter contains more impurities.

The things that we used to call gold and silver are not actually made of mono-metal, they are alloys. They could “stick” to the magnet if it were larger, more powerful, if the alloy contained a pronounced metal that could be quickly attracted. To do this, consider the types of interaction of substances with a magnetic field.

Here are the main ones:

1. Ferromagnets – strongly attracted (for example, iron, steel, nickel);
2. Paramagnetic materials are weakly attracted (for example, platinum, aluminum, magnesium, oxygen). This effect can only be detected using special equipment.
3. Diamagnets - magnetized against the direction of the external magnetic field and repelled by the magnet (for example, plastics, gold, silver, copper, water, carbon).

Having bought an ordinary magnet, you will only attract ferromagnets; in this case, you will have to forget about a treasure of gold. If you are determined to look only for products made of gold and silver, it is better for you to purchase a metal detector. It works on a different principle: it does not attract metals, but makes sounds when searching for them. Then all you have to do is dig in the right place. Decide what to buy so as not to throw money away and not be disappointed with the purchase.

Search magnets

To lift ferromagnetic metals and alloys from the bottom of rivers, ponds and wells, magnets F 200 – F 400 are used (depending on the difficulty of access and the size of the load). Even if they are the same size, the tearing force can be different, it depends on the content of neodymium (a chemical element). The more neodymium, the more powerful the magnet. For one person, a model with a diameter of up to 1 m and a lifting force of up to 300 kg will be optimal. It is important to know that flat objects attract better than round ones.

Safety precautions or what to be careful with

When using a magnet, you must adhere to certain rules:

1. Neodymium should not be heated above 80°C.
2. The magnet affects the magnetic fields of electrical devices, pacemakers, watches, credit cards.
3. The large device is stored and transported in a non-magnetic, for example, plastic container.
4. You cannot stand between a large magnet and an iron barrel/door, etc., it will be attracted, and a fracture of an arm/leg or other part of the body may occur.
5. Wipe the device after each use, clean it from dirt, do not leave it without a case, and it will serve you for many years, since the device does not break down and does not require repair!

Have an easy search, precious finds and more gold!

Source: https://ToZoloto.ru/o-zolote/dobycha/poiskovyj-magnit-na-zoloto-i-serebro.html