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www.mineralgallery.co.za Minerals K-O |
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Mottramite |
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Name
Mottramite
Chemistry
Pb(Cu,Zn)(OhVo4)
Uses
As a specimen
Color
Light green, olive green to greenish black
Hardness
3.5
Specific gravity
5.7-6.2
Streak
Green
Crystals
(Rhombic) Pyramidal, prismatic and tabular. Crystals are rare and small.
Accompanied by:
Descloisite, vanadinite, pyromorphite, mimetite, cerussite, wulfenite, azurite, malachite and calcite
Similar to:
Malachite
Mottramite is formed in the oxidized zones of copper deposits. It is one of the minerals native to Tsumeb. Mottramite and Tsumeb goes hand in hand.
Aggregates of mottramite looks wartlike, dendritic and stalactitic or crusty. The lustre can be adamantine but it is more likely resinous. The rhombic crystals are usually opaque.
