Azurite, Malachite, Calcite and Duftite on Matrix - NTS 024

Azurite, malachite, calcite andduftite on matrix, Tsumeb

Measurements:  50 x 44 x 22 mm

 Lovely, drusy azurite crystals share an unknown matrix with duftite, malachite and calcite.

The azurite has no notable damage except to the back edge. There is a crack running across the matrix, but it appears to be stable.

Weight of Specimen: 
 97.1 g

Chemical Composition:  Cu3(CO3)2(OH)(azurite)
                                       Cu2+(CO3)(OH)2  (malachite)
                                       PbCu(AsO4)(OH)  (duftite)
                                       CaCO3  (calcite)                                   

Hardness on Mohs Scale:  (azurite)  3.5 – 4
(malachite)  3.5 - 4
)  4 
calcite)  3  

Tsumeb, Northern Namibia.

Specimen Code:   NTS 024

US $ 75

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