Measurements: 68 x 52 x 34 mm Description: A group of calcite crystals, some with minute crystal growth on them (possibly calcite) with bits of duftite.
The specimen has a few nicks. Weight of Specimen: 94.0 g
Chemical Composition: CaCO3 (calcite) PbCu(AsO4)(OH) (duftite)
Hardness on Mohs Scale: (calcite) 3 (duftite) 4.5 Location: Tsumeb, Northern Namibia.
Specimen Code: NTS 032
US $ 45