Many of us stare at products and accessories made of noble metals, but not everyone understands what the stamps and figures on the products actually mean.
Under Russian law, all produced alloys containing more than 30% of precious metals, and products made of them must be approved and appropriately branded.
Unfortunately, now there is a huge number of products that are sold as products made of precious metals, but they have nothing to do with it.
Let’s take a little look at what the magic numbers and icons we see on the products.
The sample denotes the percentage of the precious metal in the alloy. That is, for gold, sample 585 means that in the alloy there is more than a half gold.
Determination of the sample and branding is the assay chamber. The stamping (it is also called a breakdown) contains not only a sample of metal, but also a code of the assay chamber.
In Russia, nowadays they use a stigma with the image of a female head in a kokoshnik. For different metals, a different form of stigma is used.
In the lower left part the cipher of the inspection is indicated, in the right – a sample.
If the product is just knocked out 925 or other numbers – it does not say anything about anything. That is, the product may not contain any noble metal at all, it can contain it in less quantity. Happens and otherwise – the product without a brand, but it is made of valuable metals.
If the product is not approved, then you can rely on your intuition, trust the master or your luck 🙂
But do not be in a hurry to get upset. Check the presence of silver and gold in the product can be at home.
For gold, this expensive pleasure, but for silver – everything is quite loyal in the price plan.
For gold use special reagents – chloride gold, the reagent is designed for a small range of gold content in the alloy, that is, for the sample 585 and 930 we will need different reagents.
Silver can be tested with a test stone, but this method did not suit me, I need to have good eyesight to see the difference between a white and a very white stripe, and the product is more crippled when karabaniye on the stone. The bottom line is that the product is carried along the stone and see what color the strip has left, in silver it should be white.
For silver, Hrompik is used (an aqueous solution of a potassium dichromate salt with the addition of sulfuric acid). Oh, how! 🙂
It is sold in the “near the jewelry” stores, it costs about 300 rubles. The reagent is transparent and bright yellow-orange in color.
The test should be carried out in a well-ventilated room, preferably using a glass rod (plastic, wood, etc. may dissolve partially in solution). The solution is applied in a thin layer (do not make a drop) and then look at the color of the reagent. If it remained the same yellow, then there is no silver in the alloy. If the reagent became red-brown – silver is, and the darker the color, the higher the silver content. The color range can be from bright pink to brown.
After testing, the product should be washed with water and wiped with a tissue for silver or use your favorite method of cleaning silver.
If the product is covered with rhodium, then the reaction will not happen, to clarify the truth, it will have to grind it a little, but here you can not do without “loss of appearance”.