{"id":11609,"date":"2021-06-04T13:41:07","date_gmt":"2021-06-04T10:41:07","guid":{"rendered":"https:\/\/drago-met.ru\/?p=11609"},"modified":"2024-03-22T15:12:04","modified_gmt":"2024-03-22T12:12:04","slug":"18-karat-zolota-kakaya-eto-proba-svojstva-splava-ego-stoimost-markirovka-primenenie-preimushhestva-i-nedostatki-dragotsennogo-metalla","status":"publish","type":"post","link":"https:\/\/drago-met.ru\/en\/zoloto\/proby-zolota\/18-karat-zolota-kakaya-eto-proba-svojstva-splava-ego-stoimost-markirovka-primenenenie-preimushhestva-i-nedostatki-dragotsennogo-metal\/","title":{"rendered":"18 karat gold: what is it, the properties of the alloy, its cost, marking, use, advantages and disadvantages of the precious metal"},"content":{"rendered":"

Carat system<\/a> The metric system is often unfamiliar to buyers in our country. In Russia, the metric system is adopted, which looks like a three-digit number imprinted on the surface of a piece of jewelry.<\/p>\n\n\n\n

If the product Foreign<\/a>It is definitely worth finding out how to read the indicated system of measurement and what the real value of the jewelry is.<\/p>\n\n\n\n

18k gold - concept of carat, origin, weight and accepted range<\/h2>\n\n\n\n

Carat<\/a> - is a measure of weight equal to 0.2 grams. The name refers to the carob tree, whose seeds had an identical mass and were used to fix the weight of precious metals.<\/p>\n\n\n\n

For a long time there was no universally accepted weight category for carats around the world, and there were small errors in both directions. This introduced discrepancies into international trade. The need arose to establish a reference weight unit of measurement for all. Thus the metric carat was born.<\/p>\n\n\n\n

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Now the carat sampling system is used in America, Canada and a number of other European countries. To indicate the system use abbreviations: K, kt, C, ct.<\/p>\n<\/blockquote>\n\n\n\n

The carat system uses numbers from 9 to 24 to indicate the purity of the alloy, where 24 is the purest gold.<\/p>\n\n\n\n

\"18k<\/span>
Gold 18k <\/span><\/strong><\/figcaption><\/figure>\n\n\n\n

The carat system of measurement of gold and its correspondence to the metric (proof)<\/h2>\n\n\n\n

In order to quickly translate the numerical concept of one system into another, it will be convenient to refer to the table:<\/p>\n\n\n\n

Metric system<\/td>999<\/td>958<\/td>900<\/td>750<\/td>585<\/td>\u041775<\/td><\/tr>
Carat system<\/td>24<\/td>2\u0417<\/td>22<\/td>18<\/td>14<\/td>9<\/td><\/tr>
Percent gold content<\/td>99,9<\/td>95,8%<\/td>90%<\/td>75%<\/td>58,5%<\/td>37,5%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

What is the 18-carat proof?<\/h2>\n\n\n\n

18K gold equals 750 samples<\/a> according to the metric system. The purest gold content in jewelry with this marking is 75%.<\/p>\n\n\n\n

Conversion of carats to sample and vice versa<\/h2>\n\n\n\n

There are special formulas that allow you to translate values from one sample system to another.<\/p>\n\n\n\n

To convert the carat system to the metric system:<\/p>\n\n\n\n

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\u041a\/24 * 1000<\/strong><\/p>\n\n\n\n

where K is the carat value.<\/p>\n<\/blockquote>\n\n\n\n

Then, to find the metric value of 18K, substitute the numbers in the formula:<\/p>\n\n\n\n

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18\/24 * 1000 = 750<\/strong><\/p>\n<\/blockquote>\n\n\n\n

Accordingly, to translate the metric numerical concept into carat, the formula will be inverse:<\/p>\n\n\n\n

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24 * \u041c \/1000<\/strong><\/p>\n<\/blockquote>\n\n\n\n

Gold assay according to GOST in Russia. The controlling body of assaying and branding<\/h2>\n\n\n\n

The amount of precious metal in golden<\/a> alloys are controlled by the state. Marking is carried out by the Assay Chamber. On the territory of Russia the following hallmarks are set: Z75, 500, 585, 750, 875, 916, 958<\/a><\/a>, 999<\/a>. Sometimes the 583 marking is stigma<\/a> Soviet Union times.<\/p>\n\n\n\n

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In our country, all jewelry pieces containing at least 30% of pure gold must be pierced and hallmarked.<\/p>\n<\/blockquote>\n\n\n\n

The structure of the stamp is as follows: first comes the number of the State Assay Control Inspectorate, followed by the hallmark of the assay certificate, and on the right side of it - the numerical marking of the sample.<\/p>\n\n\n\n

The cipher indicates the region where the item was hallmarked upon inspection. The mark of the Russian assay certificate looks like an imprint of a woman's head in a kokoshnik.<\/p>\n\n\n\n

All information about the gold product will be inscribed inside a figure resembling a spatula.<\/p>\n\n\n\n

\"GOST<\/span>
Gold assays in Russia<\/span><\/strong><\/figcaption><\/figure>\n\n\n\n

All about 750 proof or 18 carats<\/h2>\n\n\n\n

18 karat gold is an elite alloy that is in great demand. In the jewelry industry, 750 proof is considered to be \"gold standard<\/a>\" for its casting qualities.<\/p>\n\n\n\n

Composition and properties of an ideal luxury gold alloy<\/h3>\n\n\n\n

To understand why 750 gold has gained such high public recognition, it is worth taking a closer look at its characteristics.<\/p>\n\n\n\n

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Pure gold accounts for 75% of the entire alloy, and the remainder are various impurities that give the precious metal an additional resource of strength. Palladium, copper, nickel, platinum, and silver are used as additives.<\/p>\n<\/blockquote>\n\n\n\n

By increasing or decreasing the amount of various metals, craftsmen achieve a wide variety of final hues. In the showcases of jewelry boutiques one can see articles made of this precious metal in white, yellow<\/a>, emerald, purple, pinkish hue.<\/p>\n\n\n\n

Durability<\/h4>\n\n\n\n

Gold is an extremely soft metal. Products made of it would be too fragile and sensitive to any mechanical damage.<\/p>\n\n\n\n

To compensate for its natural softness, alloys are added to it. In this regard, 750 gold is really the perfect alloy: it contains a higher amount of pure precious metal and a very small percentage of alloying additives that increase strength.<\/p>\n\n\n\n

\"Gold<\/span>
Gold rings with stones<\/span><\/strong><\/figcaption><\/figure>\n\n\n\n

Plasticity<\/h4>\n\n\n\n

High-grade gold is very easy to work with and is malleable and flowable. It is used to create items of varying degrees of complexity, from classic engagement rings to filigree chains.<\/p>\n\n\n\n

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18K gold watches are especially popular and are often presented as the closest competitor to platinum.<\/p>\n<\/blockquote>\n\n\n\n

Wear resistance<\/h4>\n\n\n\n

The great advantage of this precious metal over lower grades is its resistance to corrosion and aggressive chemical elements.<\/p>\n\n\n\n

Alloy does not lose its shine, does not change color, with proper care always looks presentable.<\/p>\n\n\n\n

Shade palette<\/h3>\n\n\n\n

The hue depends directly on the additives, which also affect some casting characteristics.<\/p>\n\n\n\n

Use the table below to determine the ligature of the alloy by the color of the metal.<\/p>\n\n\n\n

\"Variety<\/span>
Tints of Gold<\/span><\/strong><\/figcaption><\/figure>\n\n\n\n
Color<\/th>Copper<\/th>Silver<\/th>Palladium<\/th><\/tr><\/thead>
Pale yellow<\/td>10%<\/td>15%<\/td>0<\/td><\/tr>
Deep yellow<\/td>12,5%<\/td>12,5%<\/td>0<\/td><\/tr>
Emerald<\/td>0<\/td>25%<\/td>0<\/td><\/tr>
Light green<\/td>6,3%<\/td>18,7%<\/td>0<\/td><\/tr>
Pink<\/td>16,7%<\/td>8,3%<\/td>0<\/td><\/tr>
Scarlet<\/td>21%<\/td>4%<\/td>0<\/td><\/tr>
White<\/td>0<\/td>5%<\/td>20%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Marking with carats on imported gold<\/h2>\n\n\n\n

You can see the numerical value of the alloy and the marking of the metal purity measurement system on the imported item. For example, if it bears the imprint \"9K\", it means it corresponds to Z75 alloy according to the metric system.<\/p>\n\n\n\n

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Next to the carat value, there is sometimes an indication of the main precious metal - the inscription \"gold.<\/p>\n<\/blockquote>\n\n\n\n

If the carat system is followed by the letter \"P\", then the marking reads: \"indicated number of carats with plumb\". The plumb line is the assurance that the item contains at least the designated amount of pure gold.<\/p>\n\n\n\n

For products that do not have an imprint of the letter \"P\", an error of 0.5 carats to the lower side is permissible. If the letter is indicated, there is no error.<\/p>\n\n\n\n

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Important: If the imported jewelry has the words \"gold-feld\" imprinted on it, it means that the precious metal was used only as gilding. If you have gold-plated jewelry from Germany in front of you, you will see the mark \"Goldmult\" on it.<\/p>\n<\/blockquote>\n\n\n\n

Cost per gram of 18K gold<\/h2>\n\n\n\n

The value of any gold alloy depends on the price of the highest sample, which is set by the Central Bank of Russia. This, in turn, is based on the London Stock Exchange rates.<\/p>\n\n\n\n

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As of 2021, the price of the highest standard varies about 4,200 rubles per gram.<\/p>\n<\/blockquote>\n\n\n\n

To know the price of any alloy, you need to multiply the price of the highest grade by the required coefficient (e.g., 0.750).<\/p>\n\n\n\n

\"Troy<\/span>
Gold bars 1 gram<\/span><\/strong><\/figcaption><\/figure>\n\n\n\n

Then you can calculate the value of 18 carats as follows:<\/p>\n\n\n\n

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4,200 * 0.750 = 3,150 rubles per gram.<\/strong><\/p>\n<\/blockquote>\n\n\n\n

Jewelry stores, pawnshops and pawnshops rely on the current price of the precious metal, but set their own price of jewelry. It largely depends on the organization's policy, location, and other markups.<\/p>\n\n\n\n

For 18 karat the following data will be relevant:<\/p>\n\n\n\n

Price according to the Central Bank of Russia<\/th>Price in jewelry boutiques<\/th>Pawnshop<\/th><\/tr><\/thead>
3150 rubles.<\/td>From 4,000 rubles.<\/td>From 2500 rubles.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Advantages and disadvantages of 18K gold<\/h2>\n\n\n
Benefits:<\/div>
Not susceptible to corrosion;<\/div>
Status;<\/div>
Variation in shades;<\/div>
Suitable for investment;<\/div><\/div>
Disadvantages:<\/div>
High cost;<\/div>
Unresistant to physical and mechanical stress;<\/div><\/div><\/div><\/div>\n\n\n

Using 18K gold in the jewelry industry<\/h2>\n\n\n\n
\"Cost<\/span>
Gold Jewelry<\/span><\/strong><\/figcaption><\/figure>\n\n\n\n

The 18-carat precious metal is made of:<\/p>\n\n\n\n