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Diameter, mm (1mm - 0,039inch)

Dioptase mineral - You can buy these samples

Dioptase is a rare copper mineral. It is too rare to be used as an ore for copper, and too brittle as a jewelry raw material. But it is very much appreciated by collectors for its rich color and medium-sized, but well-formed crystals.
You can see dioptase stone for sale and buy it in the Minerals of Russia online store.

Physical properties of Dioptase

Category Cyclosilicates
(repeating unit)
IMA symbol Dpt
Strunz classification 9.CJ.30
Crystal system Trigonal
Crystal class Rhombohedral (3)
H-M Symbol: (3)
Space group R3 (No. 148)
Unit cell a = 14.566, c = 7.778 [Å]; Z = 18
Color Dark teal, emerald green
Crystal habit Six sided prisms terminated by rhombohedrons to massive
Cleavage Perfect in three directions
Fracture Conchoidal
Tenacity Brittle
Mohs scale hardness 5
Luster Vitreous
Streak Green
Diaphaneity Transparent to translucent
Specific gravity 3.28–3.35
Optical properties Uniaxial (+)
Refractive index nω = 1.652 - 1.658 nε = 1.704 - 1.710
Birefringence δ = 0.052

Code: 275
Altyn-Tube, Kazakhstan

0.00 $ $16.00

Code: 1084
Altyn-Tube, Kazakhstan

0.00 $ $48.00

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