XDTKJDZ Mohs Hardness Test Kit, Mohs Hardness Picks, 5 Pack Mohs Hardness Tester, 5-9 Scratch Tester for Industrial Mineral Identification Kit Gem Jade Jewelry
- ★5-pack combination of Longyan 5-9 Mohs hardness pens.
- ★Material: pen point (5 # Apatite; 6 # Orthoclase; 7 # Quartz; 8 # Topaz; 9 # Corundum).
- ★Solid pen tip, inlaid with real jade.
- ★Solid metal pen holder to prevent the pen holder from breaking when testing hardness.
- ★Aluminum alloy gift box is small and convenient to carry to protect each hardness pen.