Dioptase and Calcite - NTS 054

Measurements:  45 x 36 x 22 mm

Description:  Drusy calcite crystals partially cover dioptase crystals.  

Some edges have contact marks, while one of the matrix's sides has been trimmed.

Weight of Specimen:  35.3 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 054

US $ 120