Have you accidentally seen a beautiful platinum ring and intend to get a copy of it, but in gold execution of the precious metal? Or do you want to duplicate earrings made of gold 585 from platinum raw materials? Modern jewelry masters will be able to fulfill any whim, but at the same time, the price for the work can be an unexpected surprise for the customer. In this scenario, both the cost of a gram of metal and its specific gravity play a significant role.
What it is?
Noble metals in nature are practically not observed in their purest form. As a rule, they contain various impurities that directly affect the final price of jewelry produced from such raw materials.
The alloy, where a small number of other additions are observed, is characterized by the highest breakdown — 999. From this it follows that, for example, 999 gold should have a higher cost than other alloys. And it is this gold that will set the tone for pricing per gram of all precious metals.
Each of the precious metals has certain physical and mechanical parameters. It is these indicators that enable specialists to designate their so-called specific gravity. All jewelry of the same volume, made of different metals, differ in their weight. The density of each individual alloy is determined by a special formula and has a great influence on the calculation of the specific gravity of the metal.
At the same time, it should be noted that making jewelry from pure metal is very impractical. For example, gold and silver are characterized by excessive softness, and therefore they need to be improved. Increasing strength and wear resistance, changing the tone of color, specialists directly influence the sample of raw materials, which ultimately affects the final cost of finished jewelry products.
Specific gravity indicators of the most popular precious metals
If we talk about the physical characteristics of noble metals, then in this case, you should pay attention to the following parameters:
- electrical and thermal conductivity;
- brightness and characteristic brilliance.
It is the measurement of these indicators that is taken into account when working with alloys in jewelry. Noting the most common metals used as the main raw materials, the following can be noted:
Gold is characterized by a high degree of density and gravity, which automatically puts it in 7th place among other metals. As already mentioned, its only drawback is softness, which is “corrected” by adding various impurities. It must be said that due to the high specific gravity of gold, its mining is very profitable.
This metal, which is extremely resistant to corrosion, is characterized by low resistance. Despite the fact that it, like gold, is soft, its specific gravity and density are also quite high.
- Platinum — the specific gravity of this metal is considered one of the highest — 21.45 g per cubic centimeter.
Among other things, it is characterized by increased fire resistance and at the same time does not lend itself to deformation processes. The unique characteristics of platinum make it possible to produce alloys with a high content of platinum in finished products.
Special density tables for metals and alloys allow jewelers to accurately determine the future price of the item they will be working with. These data are well known to specialists, but not always known to ordinary consumers.