Malachite After Azurite, on Azurite - NTS 059

Geode of malachite after azurite, on azurite

Measurements:  47 x 32 x 22 mm

Description: 
A geode consisting of malachite after azurite crystals, on azurite,with some parts coated with (?)chalcocite.

The malachite crystals have a few nicks.

Weight of Specimen: 
50.7 g

Chemical Composition:  Cu3(CO3)2(OH)(azurite)        
                                      
 Cu2+(CO3)(OH)2  (malachite) 
 
                                       Cu2S (chalcocite) 

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

                                     
     (chalcocite)  2 - 3

Location:  Tsumeb, Northern Namibia.     

Specimen Code:   NTS 059

US $ 80

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