K gold jewelry in silver is a combination of essential metals, but as with silver-based jewelry, mainly high purity "standard bank" a. Silver hardness of 2.7, in order to improve its hardness and shape to obtain the best results, make jewelry in silver when the need to add 7.5% copper. This silver 92.5%, 7.5% copper alloy, known as the international standard silver. Sterling silver is also known in the UK (Sterling). In addition, there were more silver content of 99% of the Zuyin jewelry.

  identification of silver jewelry. There are the following.

  1) mark. Silver jewelry should normally be marked with silver initials ("S" or "Sterling") mark. Standard silver mark is S925. Zuyin mark is S990. But many countries do not print in silver jewelry in mind.

  2) color. Silver jewelry often isolated microstrip silver white yellow, were a soft metallic luster. Easily oxidized due to long period of time, the color will turn dark yellow-white.

  3) Dian weight. The density of silver was 10.53 g / cc. Than platinum, gold, small, hand-Dian feel free fall. Steel needle scratches can also be bent. In this way the Lord can and platinum, K platinum or silver German silver jewelry imitation distinguished.

  4) acid test. Silver case of any acid will change color or even dissolved. If the inside of the silver jewelry a drop of concentrated hydrochloric acid, will immediately generate a white moss-like precipitation of silver chloride. And other precious metals no such phenomenon.

  5) Finals. After landing the standard silver jewelry sounds boring, do not bounce, do not scroll.