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Smithsonite is a gemstone quality zinc carbonate (ZnCO3), sometimes referred to as "zinc spar".

Smithsonite | #Geology
Formula: ZnCO3
System: Trigonal
Colour: White, grey, yellow, ...
Lustre: Vitreous, Pearly
Hardness: 4 - 4½

From Tsumeb Mine, Tsumeb, Otjikoto, Namibia

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