Plumboan Calcite on Tarnowitzite   Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia.  Ex. Thomas G. Fowler collection.  A tan colored stringer of small calcites on singly and doubly-terminated tarnowitzite crystals.  The specimen is 6.5 x 4.2 x 1.5 cm.  There were several thin cerussites that have been broken off this piece.  $200