18k gold - types, color, characteristics
As you know, people began to use gold as a material for jewelry back in ancient times. True, in those days there were no precise alloys, and all jewelry was made, in essence, from pure gold. Samples appeared relatively recently.
Jewelers began to use terms such as 583, 585 or 750 gold to designate the corresponding alloy based on gold and other valuable metals. The use of gold for the manufacture of body and household jewelry is evidenced by objects confiscated today during excavations of burial mounds and pyramids.
The undoubted advantages and excellent appearance of gold were noticed by ancient people many centuries ago.
Today, this beautiful yellow metal, which is one of the few most valuable on the planet, is found in a variety of forms: gold bars, commemorative coins, decorative gold wire and plates. Basically, gold in the form of standard bars is stored in banks.
After proper chemical purification of gold from various types of impurities, alloys are created from it by introducing additional alloying additives in the form of other valuable metals. This is necessary because in its pure form gold is a very ductile and soft metal, products from which are easily deformed and damaged.
The finished standard gold-based alloys are then used in the jewelry industry.
What does 750 gold mean?
Jewelry made from 14-karat gold today holds a leading position in the global jewelry industry market. The popularity of products made from this alloy of precious metals remains high despite the relatively high cost. Let's look at the reasons for such a high demand for 750 gold, its composition, varieties and advantages.
It should be noted that 750 gold itself is a very beautiful valuable alloy. There is much more gold in one gram of the alloy of this hallmark than in a gram of the 583 and 585 gold hallmarks common today. Accordingly, the price of jewelry made from 750 gold is significantly higher than from other similar standard alloys.
In order to give gold strength and rigidity, it is customary to mix it with a certain amount of other precious metals. In this case, a very precise proportion of the alloy is observed, since it is the percentage of other metals in one gram of gold alloy that determines its purity. Of course, different samples of gold will differ in their physical and visual characteristics. For example, there are several varieties of 750 gold.
The 750 hallmark may differ visually depending on the country of origin.
Types and shades of 750 gold
As mentioned earlier, all gold samples contain various metallic impurities. Therefore, the color and shade of the alloy will depend on which metals and in what proportion are introduced into it during manufacture.
All other characteristics of the gold-based alloy will also depend on this. For example, to give the alloy high strength, copper and silver are added to its composition.
In addition, the presence of silver in a gold sample gives the alloy a peculiar greenish tint, and if copper is added to gold, then the pink tint is removed from the jewelry.
18k yellow gold
Considering that yellow is considered the most natural shade of gold, it is not difficult to guess the existence of the popular 750-carat yellow gold. This yellow alloy, accordingly, consists of 75% pure gold, 17% silver and 8% copper.
Most often, this 750 gold is used in the jewelry industry for the manufacture of wedding rings, since the bright yellow hue of the alloy symbolizes the love and warmth of the newlyweds.
In addition, 14k yellow gold is slightly cheaper than the same alloy in other shades, making it more affordable for people with low incomes.
18k white gold
As already mentioned, by introducing certain metals into a gold alloy, it can be given a white tint. Today, an innumerable amount of serial and custom jewelry is made from so-called white gold. To give gold jewelry a white color, the so-called irradiation method is used.
18k white gold, like yellow gold, consists of 75% pure gold, 50% palladium and 5% silver. It should be noted that this is the only standard gold-based alloy that contains palladium.
A high percentage of palladium gives gold a bright, cool white hue, which is very popular with a huge number of fans of gold jewelry.
It is 18-carat white gold that has become widespread among eminent jewelry designers who annually create branded jewelry for famous models, businessmen and other wealthy people. It is generally accepted that jewelry made from such an alloy emphasizes the prestige and style of its owner in the upper echelons of society.
It should be added that 18k white gold, despite high demand, is cheaper than platinum. White gold alloy products cost approximately 40% less than platinum ones.
18k rose gold
As for 750 gold with a pink hue, it is obtained by increasing the percentage of copper. There are a huge number of varieties of rose gold of this standard, however, they all contain 75% pure gold, just like the yellow or white alloy of the same standard discussed above.
Italian 18k gold
Italy, which took over the baton of leadership during the popularization of the Gucci and Armani brands, has become a kind of center for the development of modern jewelry made of precious metals.
World-famous Italian 750 gold is distinguished by its bright yellow tint, which is obtained by increasing the content of silver in the alloy and completely eliminating copper from it.
However, modern Italian jewelers add a large number of other metals to the 750 standard, allowing them to obtain different shades of jewelry.
Egyptian and Turkish gold
In this case, we are not talking about the standard 750 gold, since in the jewelry alloys of these countries the percentage of yellow metal is significantly lower than 75%. The low price of Egyptian and Turkish gold jewelry is explained by the large amount of copper in the alloy and the absence of silver in it. As evidenced by metal analysis of some jewelry made in these countries, the percentage of copper can even be compared to or exceed the amount of gold.
Source: http://korona-gold.ru/blog/zoloto-750-proby-vidy-cvet-harakteristiki/
What is the difference between 585 gold and 750 gold?
» Articles » What is the difference between 585 gold and 750 gold
If you are comparing 14k and 18k gold jewelry, this article will help you. Below is how the two types of gold compare based on several key characteristics.
MasterTux/Pixabay
Is there a difference between 585 and 750 gold?
Gold 585 and 750 are similar to each other, since they have the same main component in the alloy. They differ in the impurities of other metals. The purity of gold determines the price of the product, hardness, color and the ability to wear jewelry for people who are allergic to nickel.
Gold purity 585 and 750
Depending on how many karats of gold the jewelry contains, the purity of the metal depends. 14k gold contains 58.5% pure metal, while 14k gold contains 75% pure metal. Consequently, 585 and 750 gold differ in purity: the latter is purer than the former, since it contains more precious metal.
Gold price 585 and 750
The difference in purity between 585 and 750 gold results in a difference in price. Since the latter contains more pure gold, jewelry with it is more expensive per gram. All other things being equal, jewelry made from 585-karat gold is cheaper than jewelry from 750-karat gold.
Nawalescape/Pixabay
Hardness: How strong is 585 and 750 gold?
Gold is a soft metal, so it can easily be used in alloys. The lower the gold purity value, the stronger the alloy. 14k gold contains less pure gold and is more durable than the metal in 750k jewelry. Therefore, 14k gold will wear more and bend more easily than 14k gold.
https://www.youtube.com/watch?v=u8ppCrJY2tc
Jewelry made from 585 gold is more durable and suitable for frequent wear. 18k gold items can be just as durable if you don't wear them every day.
Gold color 585 and 750
The true color of gold is more pronounced the more of this metal there is in the alloy. Gold color differs in that the latter has a warmer and richer yellow color than the former. Visually, the color of gold differs depending on what metals are present in the alloy. You can see jewelry that cannot be seen to tell what grade of gold it is.
Gold jewelry and nickel allergies
Nickel is used in the manufacture of gold jewelry, and in products of 585 standard and below it is contained in large quantities.
People with nickel allergies are sensitive to 14k gold jewelry, while 18k gold is completely harmless, even if the metal is present in the alloy. If you have an allergy, 750 gold or higher would be preferable. When choosing 585 sterling jewelry, you must be extremely careful. Among jewelry made from 585 gold, you should look for jewelry with a special mark indicating the presence of this metal.
Source: https://vivien-shop.ru/stati/chem-otlichaetsya-zoloto-585-proby-ot-750.html
750 gold standard - what is it? How much does 750 gold cost?
If you look at the periodic table of Mendeleev, then gold is a heavy metal of a yellow hue with atomic number 79. In Latin it sounds like aurum. 750 gold – what does it mean? Where is it used and how much does it cost?
Uses of gold
According to historical information, gold is the pioneer metal with which humanity interacted. Acquaintance with him took place 2-3 thousand years ago, as evidenced by the jewelry found at the excavations. There are also references to this precious metal in the Iliad and the Bible. Gold also aroused great curiosity among alchemists, who often sought ways to transform metals into precious metals, which were credited with great power.
In the modern world, gold has several functions:
- in commodity production it performs the function of money;
- in art it is used for jewelry work;
- in medicine it is used as components of some drugs;
- also used in the chemical industry and electrical equipment.
750 gold – what does it mean?
It is worth noting that pure gold without additives simply does not exist; there is always some percentage of certain impurities present. The number of parts of pure metal contained in 1000 parts of the alloy is called fineness. There are 4 standard systems used in the world: spool, metric, lot and carat. The most popular are metric and carat.
In our country, the metric system is common, that is, the ratio of the number of grams of gold per kilogram of jewelry alloy. There are hallmarks from 375 to 999. 750 hallmark gold is most valued by lovers of expensive jewelry.
European countries and the United States have a carat system. The fineness in carats is the ratio of the number of shares of pure metal from 24 parts of the alloy. This system is intended exclusively for gold alloys.
585 or 750 gold?
Most often, when purchasing jewelry, consumers are faced with 585 and 750 samples. Russian lovers of precious metals often give preference to products with 585 fineness, which is easily explained by the price-quality ratio. However, jewelry made from such gold contains more impurities.
Gold itself is a very amorphous metal, and with constant wear, the product could become deformed or scratches could appear on it. By adding silver, palladium or nickel, zinc and copper, a harder precious metal alloy is obtained. 750 standard gold contains 25% of additives such as platinum, silver, palladium, copper and nickel.
Depending on the increase in the proportion of certain components, it is possible to obtain an alloy of various shades: from soft pink to greenish. It can be noted that in Russia the most common shade of gold is reddish, and in Europe it is yellow. The famous “red gold” is made by adding copper to a jewelry alloy. When the ingot is heated, it produces a unique reddish tint.
750 gold is special in that it is easy to polish and process. The most complex and sophisticated jewelry is made from this alloy. In addition, this gold can be used as an excellent base for enamel. Precious products of this type are now gaining increasing popularity.
But it is still worth noting that 585 gold is more suitable for everyday wearing of jewelry, as it is more durable. If we compare how much gold costs 750 and 585, then a gram of the first alloy is almost 1.5 times more expensive (the price is approximately 1,100 rubles).
Quality of gold products
Gold has a chemical ability: in its pure form it is not subject to oxidation and many other chemical influences. But when combined with other metals, these properties become different.
It is generally accepted that gold alloys of purity 750 and higher are subject to little corrosion. It is worth noting that when producing an alloy, gold may be distributed unevenly, and then the area in which there is little or no gold may be corroded.
The jewelry in this place will be dull.
Italian gold
Many reputable jewelry stores offer products made from “Italian gold”. The name, as you might guess, comes from the country of origin of the jewelry. Jewelry of this type has a special type of processing. They are carefully polished, and visually the products seem to shine. In addition, the jewelry is distinguished by fine workmanship and a variety of ornaments.
When purchasing such a product, you should pay attention that scammers can pass off a product of lower quality as Italian 750 gold. Real Italian jewelry must have an appropriate certificate. The Russian eye is unfamiliar with the colors of Italian gold, which can have white and yellow shades.
Italy is a unique country. It occupies an honorable third place in the world in the production of jewelry with gold mining of no more than 100 kilograms per year. The rest of the material is purchased from South Africa. Thanks to the unique design, profits from the sale of jewelry bring considerable income to the Italian treasury. Buyers of Italian jewelry are Switzerland, the USA, China, the United Arab Emirates and other countries.
White gold
18k white gold is an alloy of gold with nickel or palladium. Sometimes platinum may be present. The white gold alloy itself has a rather dull shine. To make it brighter, a thin rhodium plating is used, which, if the jewelry is worn frequently, must be renewed quite regularly.
The typical work technique used when making jewelry is granulation. Tiny granules are welded to a very thin gold plate, and with their help, a pattern is created on the product. This type of technology dates back a long time, as evidenced by historical and scientific excavations.
Currently, many lovers of precious jewelry have heard of such famous jewelry houses as BULGARI, DIMIANI, which use the granulation technique.
When purchasing gold products, you should pay attention not only to the price, but also to the availability of the necessary certificates and passports. It is worth purchasing products from trusted and well-known manufacturers in specialized stores.
Source: https://FB.ru/article/147338/proba-zolota---chto-eto-skolko-stoit-zoloto-probyi
750 gold standard - most often used in jewelry making
At all times, gold has been valued in our world. However, it is impossible to find it in a sufficiently pure form. There are a number of different gold purities available. The most popular among them is 750 sample. It is from it that jewelry of extraordinary beauty is most often made. This alloy is obtained from less pure alloys. In this case, the method of floating metals is used. During the reaction, the solid separates and gold cuprum is released.
The second way is to obtain it from a purer alloy. A number of special alloys are added to the substance. As a result, the metal becomes harder and easier to use in production. In this case, the metal will contain almost 76% pure gold, and the remaining 24% comes from alloys. But more often you can find a split of 75% and 25%.
The main difference from key alloys
750 gold standard is the most popular in jewelry production. This is because such an alloy is easy to process. Therefore, it is very convenient and easy to produce elegant products.
The main difference between this sample and others is its high tendency to damage. If handled carelessly, the product can be easily damaged and deformed. While 585 sample is more resistant to external influences.
To increase strength, palladium or nickel is most often used in the alloy. At the same time, the color turns out soft and warm. And among all categories of alloys, it is the alloy with palladium that is the most expensive. The combination with nickel is cheaper. However, this alloy differs from others in its ability to be magnetized.
Areas of application
This 750 grade gold alloy is used primarily for the production of jewelry. The most popular of these are wedding rings. Such rings turn out to be very elegant and will please their owner for a long time.
In addition, when certain metals are added to the alloy, 750 gold may change its color. So, by adding 8.3% silver and 16.2% copper, you can get a pink tint. Using 4% silver and 20.5% copper in the alloy will result in a red color. And thus, by varying the content ratio of silver, copper, rhodium and palladium, you can obtain different colors and shades. In addition to pink and red, the following metal colors are most often obtained:
- Rich yellow;
- Green;
- Light green;
- Black;
- Blue;
- Violet;
- White.
This alloy can also be easily used for the production of other jewelry. For example, it behaves well when casting chain links. However, such jewelry must be carefully looked after and storage rules must be followed.
Reasons for oxidation of 750 gold
750 gold is almost indestructible. It does not darken or lose its appearance when reacting with various reagents. Acids and alkalis also have no effect on the material. However, the substance “royal vodka” can be isolated. This alloy is quite easy to dissolve in it.
However, because of this, you should not assume that 750 sample is invulnerable. An additional 25% may include low-quality and noble metals. Therefore, with some alloys the following changes may occur:
- Oxidation in open air;
- The appearance of plaque as a result of a reaction with chemicals;
- Darkening of some parts of the product upon contact with water.
But still, due to 75% pure gold in the alloy, these reactions occur much slower than, for example, 585 or 350 samples of gold. And remember that these changes occur only with low-quality alloys. If high-quality metals were used in the alloy, then such a sample is absolutely not susceptible to oxidation.
Cleaning 750 gold items
In order for products marked 750 to serve for a long time and please with their appearance, they must be properly cared for. Be sure to store your jewelry in a special box or case. It is advisable to wipe and polish the product with a suede cloth every day. You can also use flannel.
The biggest enemy is chlorine. Therefore, it is better to remove jewelry before cleaning the house or visiting the pool. Sweat can also damage your appearance, so before going to the gym you should put your jewelry in a case. Also, do not forget about the adverse effects of mercury on the product.
Even some cosmetics can affect decoration. Therefore, you should avoid touching the product.
Another hostile environment is iodine solution. You can remove iodine stains with hyposulfite. The decoration is immersed in the solution for 20 minutes, after which it is washed and rubbed with a cloth.
Goya paste will help you give your decoration its former shine. Apply a small amount to a woolen cloth and wipe the product thoroughly. Onion juice may also help. Place the jewelry in it for 2 hours, then rinse and polish with a soft cloth.
Sometimes dark spots appear on jewelry. A solution of soap and ammonia will help remove them. The product should be kept in the solution for about 15 minutes, and then rinsed and dried. All these methods can help you keep your jewelry in excellent condition for many years.
How to distinguish yourself from a fake
The first thing you need to pay attention to when buying gold jewelry is the stamp. It must indicate the sample of the product. The brand itself should resemble a spatula. Moreover, depending on the country of manufacture, there may be different drawings next to the sample, for example, for Russian manufacturers it is a girl in a kokoshnik.
To determine the sample at home, you can use iodine or a bite, but there is a possibility of seriously damaging the appearance of the jewelry. The most popular method at the moment is using a touchstone.
This method does not harm the decoration and allows you to accurately determine the sample. It is necessary to draw a line with the product along the surface of the slate. A test strip is drawn nearby with a special needle. The scratches are then exposed to a chemical solution.
At 750 sample, the color of the strips will be identical.
The sample can also be determined using a regular glass of water and a scale. With this method, the density of the product is measured. That is, the product is simply weighed. Then a glass of water with the decoration placed in it is weighed.
In this case, the decoration should not touch the walls of the glass. The first value is divided by the second, so we get the density of the product. Sample 750 should have a density of approximately 15.5 g/cm3.
White gold can be considered an exception; its density due to palladium can reach up to 16.5 g/cm3.
What precious and ornamental stones does it go with?
Due to the fact that 750 gold can take on almost any shade of color, it can be combined with any precious and semi-precious stones. The emphasis can be placed on white gold. It is mainly encrusted with diamonds. This color of gold favorably emphasizes the stones, and the metal itself is refined. The cost of such a product will be high, especially if platinum is present in the alloy.
Not only white gold, but also other shades are encrusted with diamonds. I make premium class jewelry from this type of metal. Many famous jewelry houses create unique products using 18-carat gold and diamonds.
Stones of various colors and shades go well with this alloy of gold. Anything stolen will look good on its owner.
Source: https://mysamocvet.ru/metally/zoloto-750-proba/
Gold purity 750 and 585 - which is better to choose and why, differences and reviews | mk-soyuz.rf
Greetings! All jewelry has a metric stamp with numbers that indicate the percentage of chemically pure gold in the alloy. The presence of a mark guarantees the content of the element in the quantity established by GOST. I will tell you what properties gold samples of 750 and 585 have, what is better to choose and why.
How are these samples different?
Native precious metal is cloudy and soft and is not suitable for making rings or earrings. It is malleable, like plasticine, and can be easily kneaded with your hands. For example, an ingot of high-grade gold the size of an index finger can easily be rolled into a thirty-meter thread.
Composition and strength
Ligatures are metals that are introduced into gold to impart strength. The more impurities in the jewelry, the denser they will be. In addition, the presence of additional components makes it possible to create jewelry of the desired shade, increase brightness and increase the price.
The composition of 585 sample usually includes the following elements:
- silver,
- nickel,
- copper,
- palladium.
The list of filler metals in the 750 marking is not very different; you can only add platinum.
Appearance and features of the brand
Externally, there is no difference between metric stamps 750 and 585. Russian products are branded with the image of a female profile, looking to the right, at the numbers. On the left is a letter denoting the state inspectorate that issued the stamp.
Marking can be either single or separate. Contains the following information:
- civil service code,
- marking of the precious metal share,
- Assay certificate mark.
Difference between different purity grades
The purity graduation shows the percentage of precious metal contained in jewelry per 1000 g. Thus, a sample of 585 means that 58.5% of 100% pure gold in it, respectively 750 - 75%. The remaining part indicates the amount of impurities.
Vsevolod Kozlovsky6 years in the jewelry business. Knows everything about hallmarks and can identify a fake in 12 seconds. Craftsmen value the metric 585 alloy for its hardness and strength, which make forging easy. 750 standard is excellent for jewelry, excellent for casting, polishing and soldering. It is resistant to aggressive chemicals.
In the world classification of gold, in addition to metric hallmarking, the carat system is used. The 750 stamp will be equal to 18 carats, and the 585 will be 14.
Differences in guest standards and quality
GOSTs provide the following definitions for marking:
- Evil is gold
- Wed - silver,
- Pl – platinum,
- N – nickel,
- M – copper,
- C – zinc,
- CD – cadmium,
- Pd – palladium,
- Ost. - the rest.
Differences in sample composition according to GOST:
| Try | Brand | Component share in % | |
| Gold | Silver | Palladium | Platinum |
| 585 | ZlSr | 58,5-59,0 | Ost. |
| ZlSrM | 7,5–8,5 | ||
| ZlSrM | 19,5–20,5 | ||
| ZlSrM | 29,5–30,5 | ||
| ZlSrPd | 25,0–26,0 | Ost. | |
| ZlSrPdTs | 28,2–29,2 | 9,5-10,5 | |
| ZlSrPdKd | 27,5–28,5 | 9,5-10,5 | |
| ZlSrNTsM | 7,5–8,5 | ||
| ZlNTsM | |||
| 750 | ZlSr | 75,0-75,5 | 24,5–25,5 |
| ZlSrM | 12,0–13,0 | ||
| ZlSrM | 14,5–15,5 | ||
| ZlSrNC | 14,5–15,5 | ||
| ZlSrPd | 9,5–10,5 | Ost. | |
| ZlSrPlM | 7,5–8,5 | 8,5-9,5 | |
| ZlSrPdN | 8,5–9,5 | 13,5-14,5 | |
| ZlSrPdN | 6,5–7,5 | 13,5-14,5 | |
| ZlSrPdNKd * | 8,5–9,5 | 8,0-9,0 | |
| ZlNTsM | |||
| * Contains boron from 0.0008 to 0.040% |
As can be seen in the table, a certain amount of impurities is acceptable. Any deviation from the standards is considered defective and sent for re-melting. Therefore, when purchasing products in specialized stores marked 585 and 750, you can rest assured that they comply with the standards.
Price and demand
The cost of jewelry corresponds to the quality of the alloy. 585 alloys are popular on the Russian market. This is due to the relatively low price per 1 gram and greater wear resistance. Example of a price chart for 585 samples:
A product with a 750 stamp will cost more. Here is a table of the cost of 750 samples for comparison:
Price for 999 standard according to the Central Bank Market value of the sample for today Price for scrap Price in jewelryIt should be noted that it is the 750th that is considered in demand in the world, since it contains a larger amount of gold. Items made by Italian craftsmen are especially valued. When processing, they use technologies known only to families of jewelers and passed on from generation to generation. These jewelry have one distinctive feature - the absence of a red tint.
Advantages and disadvantages of 750 and 585 samples
Each alloy has positive and negative sides. So, 585 gold has the following advantages:
- affordable price,
- retains shine longer even with daily wear,
- more choice of products,
- difficult to deform.
The disadvantage is the increased nickel content in the composition, which can lead to the development of an allergic reaction in people whose skin is sensitive to the component.
Advantages of 750 sample:
- more gold in the alloy,
- wide color palette,
- emphasizes status
- more profitable investment.
Flaws:
- high price,
- softness,
- not suitable for frequent wearing,
- quickly loses shine
- deformed upon strong impact.
Which type of decoration is best to choose?
You must choose based on the purpose of your purchase. So, if you plan to use it daily, then it would be better to take jewelry with the 585 stamp.
For special occasions or when choosing an elegant and unusual gift, you should give preference to the 750 stamp, since this alloy is considered more valuable. Gold of this marking is often used in the decoration of expensive and unique things. In addition, the purchased items will be harmless, even if the alloy contains nickel.
Also watch the video below about different types of gold hallmarks:
Recommendations for care, cleaning and storage
All jewelry, including gold, becomes dirty during wear, so they need to be cleaned.
Vsevolod Kozlovsky6 years in the jewelry business. Knows everything about hallmarks and can identify a fake in 12 seconds. Items marked 585 do not require special treatment, but they must be polished at least once a week using suede or cloth. But in order for gold with a 750 stamp to serve for a long time, it is necessary to take care of it, protect it from moisture, mechanical damage and reagents (hydrochloric acid and aqua regia).
The chlorine contained in disinfectants has a bad effect on the condition of any gold, so it is recommended to remove jewelry before cleaning. The same should be done before going to the pool.
It is better to store jewelry in a case, clean it with special pastes and liquids, and polish it regularly.
Customer Reviews
Ekaterina: “I was given a 585 gold chain for my birthday when I was 15 years old. I've been wearing it without taking it off for 4 years. There are some slight deformations, but overall I’m happy with the quality.”
Anna: “I was afraid to use advice on cleaning gold from the Internet. I went to the jewelry store and bought a special liquid product. I don’t regret it, the ring sparkles like new.”
Conclusion
Source: https://xn----ntbhhmr6g.xn--p1ai/dragmetallyi/kakaya-proba-zolota-luchshe-750-ili-585-v-chem-otlichie-plyusyi-i-minusyi-otzyivyi
18k gold - types, color, characteristics
As you know, people began to use gold as a material for jewelry back in ancient times. True, in those days there were no precise alloys, and all jewelry was made, in essence, from pure gold. Samples appeared relatively recently.
Jewelers began to use terms such as 583, 585 or 750 gold to designate the corresponding alloy based on gold and other valuable metals. The use of gold for the manufacture of body and household jewelry is evidenced by objects confiscated today during excavations of burial mounds and pyramids.
The undoubted advantages and excellent appearance of gold were noticed by ancient people many centuries ago.
Today, this beautiful yellow metal, which is one of the few most valuable on the planet, is found in a variety of forms: gold bars, commemorative coins, decorative gold wire and plates. Basically, gold in the form of standard bars is stored in banks.
After proper chemical purification of gold from various types of impurities, alloys are created from it by introducing additional alloying additives in the form of other valuable metals. This is necessary because in its pure form gold is a very ductile and soft metal, products from which are easily deformed and damaged.
The finished standard gold-based alloys are then used in the jewelry industry.
750 gold price
Considering the fact that there are quite a lot of 750 gold alloys, it is impossible to indicate the exact cost of a gram of such metal. However, when determining the cost of jewelry, it can be noted that today 1 gram of 750 gold costs more than 3,000 rubles. In many ways, the price will depend on the complexity of the shape of the decoration and the manufacturer himself. If you need to hand over a 750-carat gold item to a pawnshop, they will accept it at a price of approximately 1,200 rubles per 1 gram.
Source: https://ZolotoBlog.ru/zoloto-750-proby-cena-sostav.html
What is 750 gold purity - what does it look like, comparison with 585, price per gram, etc.
750 standard yellow precious metal is the most popular in the global jewelry market. The stamp of this sample indicates that the alloy contains about 75.5% pure gold and 24.5% alloy, which can be composed of various metals: platinum, silver, palladium, copper, nickel, which is why the shades of the alloys change. In the article we will look at possible alloys, talk about the price of 750 gold and compare it with 585.
Features of the sample
The popularity of 750 gold is due to the fact that this alloy is easy to process and polish, and therefore is best suited for the production of fine jewelry.
Did you know that the most popular product made of 18-karat gold is a wedding ring.
Elegant wedding ring made of 750 gold
The 750 alloy is more prestigious than other lower grades of gold because they contain less pure yellow precious metal. Jewelers in their work give preference to 750 gold, since it is often called the “gold standard of jewelry.”
However, the undoubted advantages of 750 gold appear in conjunction with its quality, such as, for example, softness, due to which the metal requires careful and careful handling.
It is important! One of the main features of products made from 750 gold, which distinguishes them from products from 585 gold, is the increased susceptibility of the former to damage. Jewelry made from 585 gold is more stable and resistant to handling.
A ligature in the form of palladium or nickel enhances the qualities of the alloy such as hardness and strength. At the same time, palladium gives gold a unique soft hue. Products made from an alloy of two precious metals – gold and palladium – are the most expensive in this category of alloys. An alloy of gold and nickel is cheaper. A distinctive feature of this alloy is the ability to be magnetized.
The nature of the ligature affects the color of the 750 alloy. The ratio looks like this:
[table id=292 /]
We recommend reading: All about 583 gold
The ligature also affects the quality characteristics of the alloy, as does the metal processing method. For example, to achieve the highest performance characteristics when creating a 750 alloy, the metal steaming method is used. 750 gold behaves excellently during processing, casting, and soldering of links.
How to care
Pure gold is a unique metal that is not exposed to any factors. This thesis cannot be applied to gold alloys containing various types of impurities. Jewelry alloys of gold, which also includes 750 standard, always contain various impurities in the form of silver or so-called base metals. The latter include, for example, zinc, copper, nickel.
Over time, the surface of gold jewelry darkens. This is caused by the interaction of the alloy (silver, copper and other metals) with oxygen, carbon dioxide, moisture, hydrogen sulfide and other substances. As a result of such contact, copper colors the products green and (or) black, and silver is transformed into black silver sulfide.
Basic tips for caring for, cleaning and restoring 18k gold jewelry to its original appearance are as follows:
- avoid their contact with objects that can lead to mechanical damage to the jewelry;
- remove jewelry from your body while playing sports, doing household chores, or when in contact with substances containing chlorine and (or) active oxygen;
- do not take medicinal mineral or radon baths while wearing gold jewelry;
- regularly wipe the products with a flannel or suede cloth - this will remove sweat particles from them;
- Avoid contact of jewelry with cosmetics and bleaching agents;
- remember that mercury has an adverse effect on gold;
- Iodine solution is another hostile environment for jewelry. You can remove dark iodine stains using hyposulfite, in which you need to immerse the jewelry for twenty minutes, then rinse under running water and wipe with a soft cloth;
- You can restore the natural shine of gold by polishing the product with a soft felt or woolen cloth, after applying Goya paste to it;
- if your jewelry has darkened over time, the juice of the onion will help to refresh its appearance by rubbing the surface of the product, leaving it in this form for two hours, then rinsing in water and wiping with a soft cloth;
- stains and darkening on gold will help remove a solution based on soap and ammonia, in which you should keep the jewelry for at least fifteen minutes, then rinse and dry again.
Did you know that an equally important aspect of caring for 750 gold jewelry is its proper storage. We will not consider this type of care for products from the point of view of ensuring their safety, but we will talk about such storage that will ensure a beautiful and well-groomed appearance of your jewelry.
One of the important tips in this regard is to give your jewelry a rest. Constant wear leads to their damage.
We recommend reading: Gold price by the end of the year: forecast
In general, you can store gold jewelry in boxes (but not cardboard!) or caskets with soft upholstery. Decorations should be placed in different compartments to avoid contact between them. If there are no changes in air temperature and humidity in the room in which the jewelry is stored, the jewelry can be preserved for a long time.
But this storage method has its drawbacks. For example, contact with air, the quality of which is usually difficult for us to assess.
One of the alternative options for storing 750 gold jewelry can be placing it in a saturated soda solution, which you can prepare yourself. To do this you need:
- five tablespoons of soda;
- two glasses of water.
The resulting mixture must be boiled for two minutes, cooled and poured into a specially prepared vessel, into which the products should then be placed.
It is important! To avoid tangling your jewelry, it is best to place them one at a time using tweezers.
Gold inlaid jewelry requires special care. Taking into account the characteristics of each stone, it is necessary to take into account both the specifics of storing and caring for gold, and for each of the stones.
We recommend reading: Precious metals market
Price per gram in Russia for the last month
One of the most important issues for investors and consumers of the jewelry market is the cost of one gram of 750 gold.
Here you need to take into account the following aspects:
- the cost of gold on the world market;
- all-Russian gold prices in the form of discount prices of the Central Bank of the Russian Federation for a certain period;
- costs for the production of jewelry made of 18-karat gold.
Taking into account the cost indicators for gold in the world and Russia, we offer you a summary table in which the average (estimated) cost of one gram of 750 gold is calculated:
[table id=293 /]
It is important! The cost of 18k gold jewelry includes not only the price of a specific gold standard, but also production costs, design services, the cost of stones used for inlay, selling costs, etc.
Now you have learned what 18k gold is and why it is the most popular jewelry alloy. It is this sample of yellow precious metal that is best suited for the production of jewelry. It cannot be said that the prices for this alloy are affordable, but its quality cannot but please the consumer. It is important to properly care for 750 gold jewelry, and then it will delight you with its beauty for decades.
It is important! The cost of 18k gold jewelry includes not only the price of a specific gold standard, but also production costs, design services, the cost of stones used for inlay, selling costs, etc.
Source: http://inzoloto.ru/cena-na-zoloto/750-proba-zolota-luchshij-yuvelirnyj-splav
Gold purity 750 and 585 - which is better to choose and why, differences and reviews
Greetings! All jewelry has a metric stamp with numbers that indicate the percentage of chemically pure gold in the alloy. The presence of a mark guarantees the content of the element in the quantity established by GOST. I will tell you what properties gold samples of 750 and 585 have, what is better to choose and why.
What is the difference between 585 and 750 gold?
If you are comparing 14k and 18k gold jewelry, this article will help you. Below is how the two types of gold compare based on several key characteristics.
MasterTux/Pixabay
750 gold: what is it?
750 gold is the leader in sales worldwide. What is the reason for such popularity? Let's try to figure it out.
Gold is the oldest noble metal discovered by man and used in ancient times. Various products of fabulous value and no less impressive beauty are discovered at the sites of excavations of ancient pyramids and burials, because the yellow metal was highly valued even then.
In our times, it has not lost its value and is used in jewelry and banking.
Now it is produced in the form of ingots for bank storage, plates for processing various surfaces and in the form of decorative wire.
After a cycle of purifying gold from various impurities, it receives the highest percentage of purity, while becoming very elastic and fragile, which makes it impossible to use it as jewelry.
To enhance strength and hardness, admixtures of other precious (and not so precious) metals are used. In precious metals, the hallmark determines the amount of pure metal per kilogram of alloy.
gold
Gold of 750 standard indicates the content of 75.5% pure gold in the alloy, all the remaining is impurities, or in other words, an alloy that may contain platinum, silver, palladium, copper and nickel. Based on the added metals, the initially yellow metal can acquire unusual shades of color: for example, bright yellow, red-pink, green and even black.
750 gold is very popular and has great sales, it is easy to process and polish, and is well suited for making jewelry. According to the foreign multiple system of 750, the purity of the yellow metal is equal to 18 carats.
750 standard is prestigious and is used in the decoration of expensive and exclusive items.
The gold alloy of this standard is considered more prestigious than others, since lower samples have a lower percentage of the precious metal. The masters of the jewelry industry, when creating their masterpieces, remain unchanged in their favorite 750 gold, which has the best reviews among clients and is a kind of “gold standard” in this area.
Having many advantages, 750 gold has some disadvantages, such as the increased softness of the alloy, which is why you need to handle it very carefully and carefully. When wearing a product, especially if it is a ring, it can easily be scratched, especially when comparing it with a product made of 585, which has much more durable properties of the alloy.
To enhance strength and hardness, palladium or nickel is added to the alloy. Palladium is a precious and very expensive metal, and it also gives gold a peculiar and unique shade. Products in this version are very expensive and only true admirers of jewelry made of precious metals can afford to buy them. Nickel is not a noble metal; its alloy is magnetic and costs much less.
Copper is similarly used as an alloy, giving the surface of the product hard properties and a red-pink color.
If the alloy in the alloy is silver, then the alloy acquires increased endurance in operation and has a green tint.
To achieve the highest performance characteristics, the method of “steaming” metals is sometimes used. With this method, the solid solution decomposes into different phases, releasing the AuCu3 aggregate. That is why, if there is a need to obtain the softest metal alloy, it is subjected to additional processing.
Ring made of “white” gold.
750 gold lends itself well to processing, casting and soldering of links. It is also good to use together with colored glass enamel, where gold is used as a base. An important aspect when interacting with enamel is the mandatory content of at least sixteen percent copper in the alloy applied to the surface, failure to comply with which may result in a pale color of the outer part of the product.
The color of 750 gold is classic yellow, as well as red and white. By using such combinations and unusual carvings, you can make a truly unique ring or other piece of jewelry. You can see examples of products containing 750 gold and their photos in this article.
Using this sample you can create uniquely beautiful jewelry.
750 standard gold has properties that are resistant to most chemical irritants, with the exception of aqua regia, under the influence of which it is destroyed.
What precious and semi-precious metals are included in the 750 standard
Slava 750 gold contains several types of metals. Therefore, the alloy can have different colors. Their technological characteristics and surface type completely depend on the alloy impurity content in the alloy.
If the alloy contains silver and copper, then it has very durable characteristics and even if repeated heat treatment is performed, such an alloy will never crack.
About the shade of 750 gold. The alloy of gold and silver has a greenish tint, but if it is with the addition of copper, then there is a range from soft pink to bright red.
The melting point of the alloy with silver is more than 1000 degrees Celsius, with copper less than 900. When the metal cools, a homogeneous solid mass is obtained, which, upon cooling to 400 degrees, breaks up into phases. If the temperature decreases, the process of the beginning of the decomposition of silver or copper decreases accordingly.
According to its chemical properties, 750 gold is actually pure gold. It is resistant to various acids. In terms of metal processing, it is even more convenient to use than the common 585.
The ligature in the form of a copper impurity increases the hardness and strength of the product in everyday use.
When silver is added to 18k gold, the strength increases and other performance characteristics increase.
If the design of the jewelry requires complex work, such as wire-bending, relief punching with strong stress on the metal, 750 gold is indispensable.
Source: http://golden-inform.ru/proby/zoloto-750/
750 gold: what are its features?
In ancient times, the use of gold metal was limited by its softness. Everything has changed since the time when alloys began to be used instead in jewelry and coinage. At first, the precious metal was alloyed with silver and copper.
Subsequently, when there were more alloy additives, a test mark appeared on the products, showing the gold content in the alloy. The more gold the alloy included, the higher the purity; accordingly, 999 was considered the highest, and 375 was considered the lowest.
Nowadays, 750 gold is of great interest because its properties satisfy the needs of most people.
750 gold, what does it mean?
When visiting jewelry stores, you cannot help but notice that buyers are interested in jewelry made of 750 gold. Therefore, a person inexperienced in jewelry has a desire to find out about 750 gold, what it is. As you know, when making jewelry and objects from precious metals, alloy impurities are added to ensure sufficient hardness. The test mark on such products indicates the value of the gold component of the alloy.
For example, 750 gold consists of 3/4 precious metal and 1/4 alloy additives. Therefore, 750 standard on the jewelry indicates a large gold component. However, this composition affects the strength of the product, making it less wear-resistant.
But the equally popular popularity of 585-carat products can be explained simply. Due to the higher content of impurities, such a gold-containing alloy has more durable properties; this is the main difference between 585 and 750. Therefore, choose it for everyday wear.
If you need to increase the significance of the gift, then it is better to do this with jewelry made from 750 samples.
Compliance with metric, spool and carat systems
In jewelry, several assay systems are used to determine the amount of ligature in a gold-containing alloy. Today, when marking precious items, two systems are used: metric and carat. The first shows the weight content of the precious metal in the alloy. For example, metric 750 means that a kilogram contains 750 grams of pure gold.
According to the karat system, the gold alloy is conventionally divided into 24 equal parts, and the hallmark shows how many of these parts are pure gold. When converting carat to metric, the formula is used: number of carats x 125:12.
It is not difficult to calculate from it that 18 carats corresponds to 750 metric gold. In Russia, until the mid-20s of the last century, a spool testing system was used. The spool test identified the number of precious metal spools in 1 pound of alloy, which corresponded to 96 spools.
When converting spool valves to metric, we used the formula: number of spool valves x 125:12.
What is the price
Since 18k gold jewelry is popular, many people want to know how much this precious alloy is worth. Compared to other gold-containing alloys, it is highly valued. The price of 1 gram in March 2018 averaged just over 1,800 rubles.
It must be said that it largely depends on what alloy metals are added to the alloy, despite the small percentage of their content. The large amount of pure aurum in the alloy makes it quite soft, so silver, nickel, platinum and palladium are added to increase the hardness.
The last two precious metals are quite expensive, and therefore their addition significantly increases the cost of gold.
Expensive, but at the same time popular is 750 white gold. It is worth noting that famous jewelry houses are engaged in the manufacture of products from high-grade white metal, and they make them in a single copy, thereby increasing the already fabulous prices.
To add gloss and luxury to the appearance, such jewelry is often encrusted with precious stones. Only wealthy people can afford to buy them.
For most buyers, the 750 standard is less attractive compared to its “related” in popularity, the 585 standard, since 1 gram of it costs 1.5 times more.
and color scheme
The ligature in the gold alloy can be represented by silver, platinum, palladium, nickel or copper. Different ratios of alloy additives change the characteristics of the alloy and its color. By combining impurities you can get many shades of gold, familiar ones like yellow or unusual ones like pink, green or even chocolate. The main thing is to maintain the ratio of impurities:
- for 18k yellow gold, the alloy consists of equal parts of silver and copper (12.5% on average);
- You can achieve a greenish tint by adding more silver (25%);
- 750 gold is red in color, due to the content of copper (21%) and silver (no more than 4%);
- the alloy becomes pink if the proportion of copper is 16.7% and the proportion of silver is 8.3%;
- the dominance of platinum, palladium or nickel in the alloy makes it possible to obtain white gold.
In white gold, platinum, palladium and silver are called noble alloys. Platinum is an expensive metal. In the ligature of the “platinum” white alloy, it accounts for 8%, but they cost much more than 75% of the yellow metal.
For this reason, products made from 18-carat “platinum” white gold are extremely rare. It is used to make settings for large diamonds.
Most jewelry is made from “palladium” white gold; despite its high quality, it costs much less.
In earlier times, high-grade “nickel” gold alloy was used in jewelry. The only positive quality was considered to be cheapness. All other qualities were below any criticism. For this reason, nickel is practically not used today. True, in the material used in the manufacture of thin decoration elements, the alloy may contain nickel and palladium, since the former increases ductility, but its share does not exceed 4%.
Product quality
The inert metal aurum does not react with oxygen, and, therefore, the air does not oxidize it. It would seem that all gold-containing alloys, where 750 standard is indicated, should not darken from reagents. Just as they should not be afraid of acids and alkalis, except perhaps from contact with aqua regia. But we must not forget about ligature impurities.
Some of them oxidize in air or when exposed to a humid environment. This leads to the formation of a dark coating, but this happens much more slowly than on their low-grade counterparts. Do not also forget that high-quality products can be easily damaged. If handled carelessly, scratches may appear on the surface.
For this reason, they are not suitable for everyday wear.
Source: https://VseoMetallah.ru/zoloto/proba/750_gold
