<a href="https://en.wikipedia.org/wiki/Metacinnabar" class="extiw" title="en:Metacinnabar">Metacinnabar</a>
<dl><dd><dl><dd>Locality: Mount Diablo Mine (Mt. Diablo Mine; Ryne Mine), <a href="https://en.wikipedia.org/wiki/Mount_Diablo" class="extiw" title="en:Mount Diablo">Mount Diablo</a>, <a href="https://en.wikipedia.org/wiki/Clayton" class="extiw" title="en:Clayton">Clayton</a>, <a href="https://en.wikipedia.org/wiki/Contra_Costa_County,_California" class="extiw" title="en:Contra Costa County, California">Contra Costa County</a>, <a href="https://en.wikipedia.org/wiki/California" class="extiw" title="en:California">California</a>, USA (<a rel="nofollow" class="external text" href="http://www.mindat.org/loc-3511.html">Locality at mindat.org</a>)</dd>
<dd>Size: small cabinet, 6.5 x 3.6 x 1.5 cm
<dl><dt>Metacinnabar</dt></dl></dd>
<dd>A rich miniature of sharp 1mm crystals on quartz matrix, of this rare mercury sulfide species (HgS). These were collected in teh 1960s. So far as I know, the locality has been defunct for decades and no more has been found. I see them about once a year, turning up in old collections. This is, so far as they go, a fairly aesthetic example</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/mrz108b.jpg">http://www.irocks.com/db_pics/pics/mrz108b.jpg</a>, Description: <a rel="nofollow" class="external free" href="http://www.irocks.com/render.html?species=Metacinnabar&amp;page=0">http://www.irocks.com/render.html?species=Metacinnabar&amp;page=0</a>