<a href="https://en.wikipedia.org/wiki/Ettringite" class="extiw" title="en:Ettringite">Ettringite</a>, <a href="https://en.wikipedia.org/wiki/Gaudefroyite" class="extiw" title="en:Gaudefroyite">Gaudefroyite</a>
<dl><dd><dl><dd>Locality: N'Chwaning II Mine, N'Chwaning Mines, <a href="https://en.wikipedia.org/wiki/Kuruman,_Northern_Cape" class="extiw" title="en:Kuruman, Northern Cape">Kuruman</a>, Kalahari manganese fields, <a href="https://en.wikipedia.org/wiki/Northern_Cape" class="extiw" title="en:Northern Cape">Northern Cape Province</a>, South Africa (<a rel="nofollow" class="external text" href="http://www.mindat.org/loc-3067.html">Locality at mindat.org</a>)</dd>
<dd>Size: 5 x 5 x 2.25 cm.</dd>
<dd>A glowing yellow cluster of large, translucent, thick ettringite crystals on a bit of calcite matrix, and with contrasting black gaudefroyite upon the right side. The large crystal is fully terminated, though admittedly has a contact on the left side where it grew against another crystal no longer present. Still, the upright, freestanding crystal is extremely dramatic, is complete; and such crystals are rare. Usually they are flatlying, whereas this is freestanding and vertical. The smaller crystal at the base is fully terminated and complete. Ex. Charlie Key.</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>
CC BY-SA 3.0
<a rel="nofollow" class="external free" href="http://www.mindat.org/photo-238791.html">http://www.mindat.org/photo-238791.html</a>