clear that pure gold or silver jewelry is not made: a pure precious metals are very soft, and the cost of such products is very high.Therefore jewelery alloy is used in which the noble metal or noble admixed with other usual (nickel, copper, zinc) metals.Jewelry sample let you know exactly how much precious metal includes one or another alloy .
breakdown referred not only to the content of the alloy, but also stigma with the relevant symbol that marks the product .Under Russian law, all the alloys that contain more than 30% of the noble metal (by weight) must have the stamp, indicating the sample.But keep in mind that in different countries jewelry samples are labeled differently.
For example, in Russia and the CIS countri
color depends on the content of gold in the alloy of other metals, such as copper and silver.Most often, for the manufacture of jewelery using gold 585.For filigree work is more suitable gold 750.Gold 958 samples are rarely used, because it is soft, it is not too saturated color and keeps polishing. All gold alloys above 750 in air do not fade .
adopted silver jewelry samples - 750, 800, 875, 916, 925, 960, 999. For platinum installed one sample - 950 for palladium - two, 500 and 850. However, palladium is for manufacturingjewelry is not used, so the probability of encounter with him is low.
outside the CIS used carat jewelry samples .Purity metal evaluation unit in this case is the British carat.Thus carat sample shows how much carat precious metal is contained in 24 carat alloy.Represented carat sample capital letter K. To convert to metric carat sample, it is necessary to divide the karat value of the sample 24 and multiply the result by 1000.
ratio and metric carat gold samples following :
- sample 375 - 9 500 carats
- Standard - 12 carat
- 585 - 14 carat
- 750 - 18K
- 958 sample - 23 carat
- 999 (pure gold) - 24 carat
before were used modern jewelry samples (metric and carat), Russia acted spool test, and in Western Europe - lots .
As we have said, jewelry sure to put the stamp with the symbol sample .For products manufactured in the CIS, the sample will be indicated in the metric system, all the rest - in carat.Sometimes you can find the type of stigma 23KGP.This means that the product is plated, it is covered with 23-carat gold (gold 958 samples).On the Russian gold-plated product sample is not assigned.
jewelry produced in Russia, except hallmarks of the sample (which puts the Chamber assay control) must be list of names - a brand of the company or the master .List of names is composed of four symbols.The first - is the code of release (the letter A corresponds to 2001, B - 2002, and so on. D.), The second - a code inspection assay control, others - the manufacturer code.
On Genuine list of names should be only from the top or left of the sample , both hallmarks should be clearly properly formed.All characters must be enclosed list of names into a single circuit.For products from abroad Nominalia may not be, it's okay.The sample naturally in such product will carat.
If you really want to buy quality jewelry, important to know what are the jewelry of the sample and the stigma - it will help you avoid mistakes.