MOHS RatingMOHS RatingGemstoneMineral Group10Diamond9Ruby , SapphireCorundum8TopazTopaz7.5EmeraldBeryl7.5AquamarineBeryl7AmethystQuartz7AmethystQuartz6.5Peridot5.5 - 6.5Opal3OnyxYou May Also Like...Metal Melting Point ChartTips for Measuring Your Finger for Ring SizeHow to Measure Your Finger for Ring SizeKarating Up and Down ConversionsDiamond Millimeter Size to Carat Weight Conversion ChartColorPlatinum ConversionsGold Buying Business Tips
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