Malachite After Azurite - NTS 033

Malachite after azurite, good example, no damage - Tsumeb

Measurements:  40 x 28 x 16 mm 

Description:  A good and undamaged example of malachite after azurite. The small matrix appears to be calcite and duftite. The crystal has bits of a (to us, unknown) mineral coating.

Weight of Specimen:  19.7 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  

Location:  Tsumeb, Northern Namibia.

Specimen Code:   NTS 033

US $ 200

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