1 and 925 sterling silver plated with platinum. Compared with gold, silver is a relatively unstable metal that will turn yellow and black due to external factors. If the silver jewelry is black, you can use a small jewelry brush to clean the fine seams of the jewelry, and then drop a drop of silver lotion on the paper towel to wipe off the black oxide on the surface of the silver jewelry.

2. Plating platinum on 925 silver can effectively isolate 925 silver from the outside air. This platinum effect can last for 4- 12 months according to the different protection procedures of jewelry. Plain silver: In the jewelry industry, 925 pure silver or 990 foot silver is directly processed into finished silver ornaments, and the 925 pure silver and S990S pure silver jewelry that does not contain platinum, colored gold and other alloys and other jewelry and jade articles is called "plain silver".

3. If you find signs of yellowing in sterling silver jewelry, the easiest way is to gently wash the surface with toothpaste and some water. Hit the floor, a piece of sterling silver jewelry, no elasticity, issued a "bam bam" sound. The lower the color, the lower the sound, and the sharper and higher the rhyming sound; If it is made of copper, its sound is high and sharp, and its rhyme is short and short; If it is made of lead and tin, the sound of falling to the ground is dull, short and inelastic.