Azurite Crystals on Conglomerate Matrix - NTS 009

Azurite crystals on a conglomerate matrix

Measurements:  58 x 44 x 43 mm

Description:  A specimen consisting of a nice azurite crystal, sitting on the edge  
of a small cavity of azurite crystals, all resting on a conglomerate matrix of azurite, malachite and (what appears to be) a (?)feldspar clay stained with traces of copper oxide.

There is some damage to the crystals on the edge of the cavity, and a stable crack in the matrix.

Weight of Specimen:  91.5 g

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

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

Location:  Tsumeb, Northern Namibia.

Specimen Code:  NTS 009

US $ 40

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