<a href="https://en.wikipedia.org/wiki/Dolomite" class="extiw" title="en:Dolomite">Dolomite</a> (Var.: Cobaltoan Dolomite), <a href="https://en.wikipedia.org/wiki/Calcite" class="extiw" title="en:Calcite">Calcite</a>
<dl><dd><dl><dd>Locality: <a href="https://en.wikipedia.org/wiki/Tsumeb" class="extiw" title="en:Tsumeb">Tsumeb</a>, Otjikoto (Oshikoto) Region, Namibia (<a rel="nofollow" class="external text" href="http://www.mindat.org/loc-43981.html">Locality at mindat.org</a>)</dd>
<dd>This oddball is a cast formed as a thin layer of (sturdy!) cobaltian dolomite coated an existing plate of rhombohedral calcite crystals. The calcites then dissolved away, leaving this cast plate with both positive and negative sides showing! 8.8 x 7.6 x 1 cm</dd></dl></dd></dl>
<bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a>
</bdi>
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