Tags: Chemical Substance, Mineral.
Polydymite Ni2+Ni23+S4 is a supergene thiospinel sulfide mineral associated with the weathering of primary pentlandite nickel sulfide.Polydymite crystallises in the isometric system with a hardness of 4.5 to 5.5 and a specific gravity of about 4 is dark violet gray to copper-red often with verdigris and patina from associated copper and arsenic sulfides and is typically in amorphous to massive infill of lower saprolite ultramafic lithologies.