What is 925 silver

925 silver is done internationally silver silver jewelry international standards. It is different from 9.999 silver, because silver purity of 9.999 is relatively high, very soft and difficult to make complex and varied set of jewelry, and 925 silver can do it. 925 sterling silver jewelry is actually not 100% silver, it is because the silver added 7.5% of the alloy, so that silver sheen, brightness and hardness are improved. 
Generally in the market by selling pure silver are 925 silver, instead of 999 silver, because silver is to add 925 by other metals into gold and silver together, this 925 silver in the international arena has also been recognized as a silver-cheng, the ratio was 7.5 % of the alloy with 92.5 percent of silver, such as silver jewelry forging out stronger than the hard wear and deformation, the real 999 sterling silver with gold as a very soft, add the cross of silver alloy jewelry will do so out of balance durability , does not wear a few days later on the surface deformation and wear too much and need to keep polishing. 
Since the 1851 launch of the first set of Tiffany silver volume of 925 per thousand of silver jewelry, the 925 silver began to pop, so the silver in the market are identified 925 as the standard for silver. 925 silver jewelry after polishing after showing very beautiful metallic luster, but also with a certain degree of hardness, can be inlaid precious stones, made of high-end jewelry. 925 silver design with built there silverware in Europe and America style, rough, bold, avant-garde, is in fashion, there are beautiful, delicate type, suitable for mass taste. 
Silver oxide would lead to the biggest reason is that the air of oxygen, so the air barrier is the best way of maintenance, such as silverware on sealed plastic bag then put jewelry box, separated by air and silver contacts. When the silver oxide may be washed or rubbed Yinshui silver cloth to polish silver. However, the harmful effects of washing Yinshui stronger, so until the last resort as far as possible, please use cloth to wipe silver; such as the use of washing bright silver washed immediately picked up after the flush and knead, and the surface of the chemical substances clean-ching, and drying hair dryer, or oxygen in the water will accelerate the oxidation silverware.