Calcite and Dioptase - NTS 047

Measurements:  38 x 26 x 20 mm

Description:  Gemmy calcite crystals with bits of dioptase, sit on a conglomorate matrix. 

Some of the crystals have nicks, and there is damage to some edges of the specimen.

Weight of Specimen:  24.5 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 047