Dioptase, Shattuckite, Quartz and Calcite – NKO 002

Dioptase, shattuckite and calcite crystals on quartz matrix



Measurements:   56 x 45 x 34 mm

Description:  A few dioptase crystals, the largest 12 mm long, coated with a thin layer of minute calcite crystals, share a quartz matrix with small balls of shattuckite on facets of quartz, coated with a thin layer of minute, clear to snow-white, calcite crystals.

The edges of the specimen is broken, revealing the dioptase with a coating of calcite.

Weight of Specimen:  77 g

Chemical Composition:  Cu2+SiO2(OH)2 (dioptase
                                       Cu5(OH)2(SiO3)(shattuckite) 
                                       SiO2  (quartz)  
                                       CaCO3  (calcite)  

Hardness on Mohs Scale:  (dioptase)  5
                                          (shattuckite)
3.5
                                          (quartz)  7
                                          (calcite)  
3
                                    
Location:  Kaokoland,
Northern Namibia.

Specimen Code:  NKO 002

US $ 120

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