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Fine Jewelry University

1. Caring for and Cleaning Your Jewelry

   FJU Category: Care & Cleaning | Tags: Caring for Jewelry, Jewelry Cleaning

   … and anything lower. Hardness is related to the Mohs hardness scale. Diamond is the hardest at 10. Talc is listed as 1 the softest. Pure gold (24 karat) is Mohs 2.5, 14 and 18 karat list at Mohs 3. Platinum list at Mohs 4.33. Sterling silver list at Mohs 2.5. This shows why jewelry metals get scratched by things like hard toothbrushes and dirt (most dirt ranges 4-8 on the Mohs scale). Several different types of settings hold diamonds in the jewelry. From time to time …