SMITHSONITE
ABOUT THE SPECIMEN
An excellent example of Tsumeb's legendary pink smithsonite, showcasing an expansive coverage of rosy rhombohedral crystals across contrasting sulfide matrix. The specimen's delicate hue and distinctive curved crystal faces suggest a cobalt-rich variety, though the precise chromophore mix of cobalt, iron, and manganese that creates these coveted colors remains part of Tsumeb's mystique. Dating from the mine's golden era several decades ago, specimens of this size and quality rarely emerge on today's market. While surface bruising is present, it does little to diminish the piece's significance as a great representative of both the species and this world-famous Namibian locality.
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Smithsonite was the second most abundant secondary mineral at Tsumeb behind cerussite, distributed across all three oxidation zones of the Otavi dolomite-hosted pipe body and present in virtually every part of the deposit. The extraordinary color range - apple-green from copper substitution, vivid pink-rose from cobalt, deeper red-pink from manganese, and cadmium yellow - reflects the exceptional chemical complexity of Tsumeb's ore, which concentrated an unusual assemblage of trace metals alongside the dominant zinc. Tsumeb stands as essentially the only locality to have produced well-formed, large rhombohedral smithsonite crystals in quantity; most other world occurrences are restricted to botryoidal masses. The famous "Blue Pocket" of the mid-1970s and the substantial cobaltoan productions from 28 Level in the second oxidation zone during the late 1970s represent the peaks of specimen output. A particularly rare subset - smithsonite pseudomorphing azurite crystals from West 20 Stope, 29 Level - produced hollow copper-carbonate shells retaining the azurite form, from what appears to have been a single pocket. With the mine closed since 1996 and the Tsumeb Mine Notebook classifying smithsonite as merely "very common" in terms of availability, the paradox is that while specimens circulate regularly, anything above average quality has become genuinely difficult to source.