Experience Watchmaking & Jewelry Repair

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MOHS Rating

MOHS RatingGemstoneMineral Group
10Diamond
9Ruby , SapphireCorundum
8TopazTopaz
7.5EmeraldBeryl
7.5AquamarineBeryl
7AmethystQuartz
7AmethystQuartz
6.5Peridot
5.5 - 6.5Opal
3Onyx