Calcite

Unknown Owner

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An absolutely bizarre Tsumeb calcite, even for a locality that turned out calcites in a dizzying array of forms. This one looks a lot like a spinel-twinned copper specimen in form, of all things - with a central spine and radiating crystals. The specimen has an odd light orange/peach color, from an unidentified (apparently iron-based) microcrystalline coating. Ex. Marty Zinn and Chuck Houser collections.