Calcite, Mottramite and Duftite - NTS 010

Well-formed calcite crystals with mottramite and duftite

Measurements:  87 x 57 x 45 mm

Description:  A delicate, complex specimen consisting of well-formed calcite crystals with brown inclusions. The reverse side is covered with (?)mottramite and duftite. The bits of red is unknown, not sure whether it is indeed another mineral, or perhaps even of human origin eg. paint ...?

The specimen has relatively little damage.

Weight of Specimen:  188.9 g

Chemical Composition:  CaCO3  (calcite
                                    PbCu(VO4)(OH)  (mottramite)  
                                    PbCu(AsO4)(OH)  (duftite

Hardness on Mohs Scale:  (calcite)  3
                                      (mottramite)  3 - 3   
                                      (duftite
)  4 

Location:  Tsumeb, Northern Namibia.

Specimen Code:  NTS 010

US $ 220


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