There are two standard probing silver: metric and carat. The Karat system used in the UK, USA and some other countries, and metric, in turn, adopted in most countries of the world, including in Russia and the CIS. A sample of silver is the amount of precious metal in 1000 grams of the alloy. The higher this value is, the less impurities used to create the product.
The Karat system takes 1/24 of the silver in the alloy for 1 carat and the metal ingot with no impurities — for 24 carats. A similar system existed in Russia until 1927, but it was based on Russian measures of weight — pounds and spools, later disused.
Guarantee of the authenticity of silver jewelry is the mark with the mark sample and a sign of the state inspection. In Russia it is a print of the profile of the girl in the headdress, and on Soviet products — star. Claiming subject to all the decorations and household items containing more than 80% of the silver that is 800 samples and above.
Alloys that contain less than 80% silver, used for technical purposes. They make solder, springs, pins and sewing needles. In performance such compounds are quite durable and able to withstand a greater load, but unaesthetic due to the high content of copper.
Made of silver 800, 830 and 875 samples produce Cutlery, home decor and costume jewellery. This files most often because it was cheaper as alloys using copper, less zinc, aluminum or Nickel. So typically, the alloy has a yellowish tint and quickly oxidized in air.
The best alloy used in the jewelry industry, 925 or 960. Alloy containing at least 92.5% of silver has high performance characteristics while maintaining ductility. It is ideal for the production of rings, chains, pendants and bracelets every day. Metal 960 samples closest to pure silver, so perfect for creating the most beautiful Handicrafts.
Of 999 silver cast bars and minted coins. Precious metals remain one of the best ways to invest capital, because practically worthless.
When choosing silver jewellery it is necessary to consider that the composition of the alloy metals are copper, zinc, cadmium, aluminium or Nickel can cause an allergic reaction. If you are prone to allergies, look for products made from surgical steel or titanium.