Gemstone Hardness Reference Set – Mohs Scale Mineral Testing Stones templates the kit includes two earring

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Gemstone Hardness Reference Set – Mohs Scale Mineral Testing Stones templates the kit includes two earringThis Gemstone Hardness Reference Set is a practical tool for gemologists, jewelers, goldsmiths, and gemstone collectors who need to identify and compare gemstone hardness. Similar to a Mohs hardness testing kit, this set includes carefully selected natural minerals that represent different hardness levels used in gemstone identification and testing. The reference set includes minerals such as Epidote, Crystal (Quartz), Garnet, Precious Opal,

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