Cumengeite

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This is a whole bag full of sub-millimeter cumengeite crystals coated on shards of anglesite. The largest piece is just under 1 cm, so all are micros, but still there is a lot of cumengeite here that could be broken up and sold individually as reference specimens if you want. It is assuredly one of the boleites collected during Eduard Cumenge's famous expeditions in the late 1800s to this locality that described the species. Thus, it might even be fair to say it is co-type since he found it at the same time he brought back the famous larger pieces in the Sorbonne, from which the species was described. 1 x 0.8 x 0.5 - 0.3 x 0.3 x 0.2cm