Mohs Hardness Test Kit Mohs Hardness Picks 5 Pack Mohs Hardness Tester Industrial Mineral Identification Kit Gem Jade Jewelry 5-9 Scratch Tester
Special 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
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