... ……hardness(mohs) 9.15…….ture density 3.9Marterials: petroleum cokeGreen silicon carbide is produced as the same type as the black ... materials.It’s crystallization have higher purity and hardness.Green silicon carbide is suitable for processing hard alloy,metallic and non ... as copper,brass,aluminium,magnesslum ,jewel,optical glass,ceramics,etc.Super micropower of it is also a kind of ceramics material ...