Tags: Chemical Substance, Mineral.
Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral. It is transparent to translucent. Its luster is vitreous to sub-adamantine. Its formula is CuSiO3·H2O (also reported as CuSiO2(OH)2). It has a hardness of 5 the same as tooth enamel. Its specific gravity is 3.28–3.35 and it has two perfect and one very good cleavage directions. Additionally dioptase is very fragile and specimens must be handled with great care.
