Product Description_x000D_ $Why does jewelry turn black after wearing it for a long time?_x000D_ 1. The metal reacts chemically with sulfur molecules in the air to produce black chemical substances._x000D_ $ How to deal with blackened jewelry in daily life_x000D_ 1. You can try to apply a little toothpaste on the surface of the jewelry, and then wipe it with a toothbrush dipped in warm water. $_x000D_ 2. Rinse with a solution of detergent and warm water, then wet the surface with phosphoric acid solution, then_x000D_After wiping with flannel, the jewelry can be much cleaner._x000D_ $ Great gift for mom or grandma on Mother's Day, anniversary, birthday or wedding celebration._x000D_ Specifications:_x000D_ Material: silver plated_x000D_ Main stone: zircon_x000D_ Size: Length 3.3cm, Width 1.4cm_x000D_ Packing list: a pair of earrings