Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
Thumbnail, 2.7 x 2.3 x 1.5 cm
Tsumcorite is a rare lead arsenate and this thumbnail is richly covered with orange-brown microcrystals from the name-sake Type Locality. It is a small specimen, but a very rich one with high quality microcrystals in rich covering. So, it is pretty - most are very much uglier! This showy and excellent rarity is from the Dr. Mark Feinglos Collection, a noted rare species collector.