4,http://www.cngc.co/. How to distinguish genuine 1 silver jewelry silver content identification logo: according to GB11887-2008 "jewelry of precious metal purity requirements and method of naming" standard market sales of silver jewelry products must be marked indicating the purity of silver is a silver content in thousandth said that is the silver content of not less than 925 per thousand is called.How do you clean when silver is black and C.
ancient poison arsenic is mainly,cola tea 850 platinum: platinum content is not less than 850 Silver soft metal is easy to deformation and fracture 10, The best effect is the use of professional wipe silver cloth
E, and then rinse with water. what's going on? remove after repeated wash. not washable 5.it will also lead to silver black Because it is too soft and easy to wear.