Mohs hardness 9.5 microhardness 2840-3320Kg\mm2 color black or dark green

        It is made of high-quality green silicon carbide (high hardness, chemical stability, certain toughness) as the main raw material, and its hardness is between corundum and diamond. It can remain intrinsic at high temperature (above 1000 °C). Hardness does not chemically react with many non-metal (glass, ceramic) and certain metal (zinc, steel and alloy) materials, suitable for processing glass, ceramics, stone, cast iron and some non-metal, hard alloy, high-speed steel, etc.