... .30 Character:It is cubic crystal system or amorphous powder, olive green, which has metallic luster. its gravity is 5.21, ... covering power and magnetism. Application:It is mainly used in green grourd pave paint colorant, smelting metal chromium, chromic carbide ... It is also used for making sun-proof coating, abrasive, green polishing compound, refractory materials and special printing ink for printing ...