Dioptase Crystals on Matrix – NKO 004

Dioptase crystals on conglomerate rock matrix

Measurements:  43 x 41 x 37 mm

Description:  A group of dioptase crystals, together with bits of a dark mineral (unknown to us), sits on a conglomerate rock matrix, partly coated with a thin layer of (?) shattuckite. 

Some dioptase crystals have small nicks.

Weight of Specimen:  30.2 g

Chemical Composition:  Cu2+SiO2(OH)2 (dioptase
                                       Cu5(OH)2(SiO3)(shattuckite) 

Hardness on Mohs Scale:  (dioptase)  5
                                          (shattuckite)
3.5

Location:  Kaokoland, Northern Namibia.

Specimen Code:  NKO 004

US $ 25     

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