Dioptase and Calcite - NTS 017

Cavities lined with dioptase, calcite and duftite, in rock matrix

Measurements:  90 x 60 x 38 mm

Description:  A
rock matrix with several exposed cavities, lined with dioptase, calcite and duftite.

The edges to some cavities are damaged. This specimen comes from our personal collection.

Weight of Specimen:  265.0 g 

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

PbCu(AsO4)(OH)  (duftite

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

                                            (duftite) 4.5

Location:  Tsumeb, Northern Namibia.

Specimen Code:  NTS 017

US $ 340

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