<a href="https://en.wikipedia.org/wiki/Gypsum" class="extiw" title="en:Gypsum">Gypsum</a>, <a href="https://en.wikipedia.org/wiki/Rhodochrosite" class="extiw" title="en:Rhodochrosite">Rhodochrosite</a>
<dl><dd><dl><dd>Locality: Sunnyside Mine (American Tunnel; Mogul Mine; Washington Mine; Belle Creole; Gold Prince; Brenneman Mine; Sunnyside Mine Group), Howardsville, Silverton District, San Juan County, <a href="https://en.wikipedia.org/wiki/Colorado" class="extiw" title="en:Colorado">Colorado</a>, USA (<a rel="nofollow" class="external text" href="http://www.mindat.org/loc-3687.html">Locality at mindat.org</a>)</dd>
<dd>Size: small cabinet, 7.6 x 6.5 x 6.2 cm
<dl><dt>Rhodochrosite with Selenite</dt></dl></dd>
<dd>This is definitely a weird specimen. It features a combination matrix of manganese ore and spongy, pink, rhodochrosite. A crystal of gemmy, colorless gypsum has filled the small open space in a cavity of the matrix. Sitting on the gypsum and partially included within are rhombs of pink rhodochrosite, to 2.0 cm across, that then have a very thin rim of tan siderite enclosing them. The rhodos have been slightly contacted, otherwise this piece would be priced a lot higher. This was part of a well-known specimen in teh collection of Gerald Herfurth, a noted Colorado collector.</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
Image: <a rel="nofollow" class="external free" href="http://www.irocks.com/db_pics/pics/mun05-159a.jpg">http://www.irocks.com/db_pics/pics/mun05-159a.jpg</a>, Description: <a rel="nofollow" class="external free" href="http://www.irocks.com/render.html?species=Gypsum&amp;page=13">http://www.irocks.com/render.html?species=Gypsum&amp;page=13</a>