Azurite in Unknown Mineral - NTS 011

Azurite in unknown mineral,Tsumeb

Measurements:  58 x 44 x 43 mm

Description:  A specimen consisting of azurite (including several nice crystals), duftite and bits of malachite in and on a (to us, unknown) mineral. We are not sure whether the unknown mineral plays host to the other minerals or whether it has partially replaced them.

The specimen has a few contact marks.

Weight of Specimen:  46.0 g

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

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

Location:  Tsumeb,
Northern Namibia.

Specimen Code:   NTS 011

US $ 45

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