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Dioptase

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BMM1029398

Dioptase

Description Tabs

Description
Locality: 
Renéville Mine, Kindamba District, Pool Region, Congo (Republic)
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 3.5 × 3 cm
Description

Attractive lustrous green prismatic crystals of dioptase measuring to 9 mm in length across the top of this matrix with bright transparent calcite. The crystals to 9mm are strongly glassy lustrous with a rich dark emerald-green color and very sharp. The backside is cut. This piece comes from an old collection and was acquired in 1999. The old collection label is included.

Mineral Data
What's on the rock

Dioptase

Formula: 
CuSiO3·H2O
Strunz: 
9.CJ.30
Crystal System: 
Trigonal
Hardness: 
5.0
Streak: 
Green
Type Locality: 
Altyn-Tyube dioptase deposit (Altyn-Tube), Altyn-Tyube area, Kirghiz Steppes (Asiatic Steppes), Karagandy Province (Qaragandy Oblysy; Karaganda Oblast'), Kazakhstan...