Instruction
1
Look carefully at the gold jewellery: if there's a trial or not. Surrounding the sample must meet the marking, adopted in the Russian Federation. Even if you buy gold jewellery, which was made outside of our country, the sample of the Russian assay chamber needs to stand on it necessarily. So do not buy gold abroad, as the risk that you sell a gold plated product or alloy, similar in color of gold is very high.
2
If you saw that instead of 585-th sample on the product is 583-I can feel it to buy, because it was made in Soviet times, when fakes almost not there, but the implementation of such gold through public and private jewelry stores legitimate.
3
If the sample is in place, inspect the product again and make sure that near the clasps of earrings or chains no microscopic scratches. Often suppliers of gold products sent to check only locks on which is placed the sample, and then install them on gold-plated products.
4
Buy at the pharmacy normal lyapisny pencil (silver nitrate) used for cauterizing wounds. Moisten with water the surface of the inspected product and spend it on the pencil. If it's an alloy, not gold, the metal will darken.
5
Check plated the product, try it on the tooth, or try it a little scratch. Of course, you eventually have to pay for the product lost its presentation, but you will give him a real price – be it gold or another metal with a coating.
6
Heat you have purchased the product on low heat to 300-400 °C, and then cool it: the alloys with low contents of gold will appear iridescence, and gold with small amounts of impurities in your view will not change.
7
Take the product to a jeweler or a pawnshop, since at home to conduct experiments with acid and needle files still dangerous – both for you and for a subject believed to belong to gold. The jeweler will test it with nitric acid or a little (to a depth of 60 microns) nadpilivayut his special tools.
8
Do not attempt to determine the density of the metal from which manufactured products, if you don't have access to scales: the error in this case is very large, especially since the test is likely to have a small product, but not an Imperial crown, as once did the Archimedes.