Dioptase and (?)Calcite on Matrix - NTS 054

Dioptase and (?)calcite on unknown matrix

Measurements:  65 x 38 x 22 mm

A specimen consisting of dioptase and (?)calcite on a (to us, unknown) matrix. Another pale green mineral partially overcoats the matrix. 

Some of the larger dioptase crystals and some areas near the edges of the specimen, have damage.

Weight of Specimen:  44.1 g

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

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

Location:  Tsumeb, Northern Namibia.

Specimen Code:  NTS 054

US $ 25

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