RMJEZTQD Mohs Hardness Test Kit, 7 Pcs 3-9 Scratch Tester Hardness Test Pen with Storage Box, Portable Hardness Testing Equipment, for Industrial Mineral Identification Gem Jade Jewelry.

√ This hardness test pen is applicable for gemstone, ceramic tile, floor, glass, mobile phone screen, mineral, concrete, etc.thicknesses, including materials such as polyethylene, polyester, and aluminum foil. √ Principle- Use the corners of the ore to scratch the sample to be tested, and judge the hardness of the sample based on whether there are scratches on the sample: if there are scratches, it means that the hardness of the sample is lower than the hardness of the hardness pen √ Test level- Its level is 3# calcite, 4# fluorite, apatite-5, orthoclase-6, quartz-7, topaz-8, corundum-9. The test gemstone at the tip of the hardness test is a carefully processed multi-faceted shape, which is more convenient and durable to use √ Indirect visual estimation method- The hardness of the gemstone can be reflected in the smoothness of the facets and the sharpness of the edges after processing. √ Under a magnifying glass, you can see that the facets of gemstones with higher hardness are smoother and flatter than those with lower hardness, and the face edges are sharper.