Silver ornaments are low in price, generally heavy and easy to turn black. This black sulfide can't be cleaned without grinding off, so when it turns black, use something polished, such as toothpaste.

But platinum has better oxidation resistance. At most, impurities are accumulated on the surface, and there are no oxides and sulfides. Just wash it with detergent.

Jewelry can generally be cleaned with neutral detergent, such as detergent. You can wash almost any jewelry with warm water and detergent, then rinse it with clear water, and finally wipe it with cloth or soft paper.