Characteristics of Dioptase

Characteristics of Dioptase:

Chemical Name: Copper silicate

Formula: CuSiO2(OH)2

Colors: Emerald- to blue-green

Structure: Hexagonal/trigonal

Hardness: 5

Specific Gravity: 3.3

Refractive Index: 1.67-1.72

Lustre: Vitreous to greasy

Streak: Pale greenish-blue

Locations: Kazakhstan, Iran, Namibia, Congo, Argentina, Chile, USA

 

What is Dioptase? 

Bright green Dioptase would make a superb gemstone to rival emerald in color, where it not for its softness and easily set-off cleavage. It is very popular with mineral collectors, but its extreme fragility means that, although it can be cut into a collector’s gemstone, these are very susceptible to mechanical shock, and will shatter if exposed to ultrasonic cleaning; even mineral specimens of Dioptase must be carefully handled and stored. The name Dioptase refers to the gem’s highly transparent crystals, from the Greek for “to see through”.
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