Dioptase and Calcite Crystals on Matrix - NTS 020

Dioptase and calcite crystals on matrix

Measurements:  41 x 22 x 16 mm

Description:  A few dioptase crystals (up to 11 mm long), together with a few calcite crystals, sit on a (predominantly calcite) matrix. 

The specimen has some damage to the edges.

Weight of Specimen:  17.8 g

Chemical Composition:  Cu2+SiO2(OH)2  (dioptase)
                                       CaCO3  (calcite)

Hardness on Mohs Scale: 
 (dioptase)  5  
                                          (calcite)  3

Location:  Tsumeb, Northern Namibia.

Specimen Code:  NTS 020


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