Saladulce Mohs Hardness Test Kit Mohs Hardness Picks 5 Pack Mohs Hardness Tester Industrial Mineral Identification Kit Gem Jade Jewelry 5-9 Scratch Tester Jaregu adding to coffee and other

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Saladulce Mohs Hardness Test Kit Mohs Hardness Picks 5 Pack Mohs Hardness Tester Industrial Mineral Identification Kit Gem Jade Jewelry 5-9 Scratch Tester Jaregu adding to coffee and otherBrand: Saladulce Features: Model: 5# 9# Mohs hardness Size: pen 100x6mm; box 150x100mm Material: pen point(5 # Apatite; 6 # Orthoclase; 7 # Quartz; 8 # Topaz; 9 # Corundum) Weight: pen7. 8g, total weight 221g model number: Denny 059 Part Number: Denny 059 Details: Introduction of hardness pen The hardness of a gemstone refers to the ability of the gemstone to resist scoring, pressing and grinding of foreign objects. The hardness of a gemstone is an