MOHS RatingMOHS RatingGemstoneMineral Group10Diamond9Ruby , SapphireCorundum8TopazTopaz7.5EmeraldBeryl7.5AquamarineBeryl7AmethystQuartz7AmethystQuartz6.5Peridot5.5 - 6.5Opal3OnyxYou May Also Like...ColorDiamond Millimeter Size to Carat Weight Conversion ChartKarating Up and Down ConversionsTips for Measuring Your Finger for Ring SizeHow to Measure Your Finger for Ring SizeMetal Melting Point ChartPlatinum ConversionsStone Weight Estimation Formula
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