Mineral: Phosgenite
Chemistry: Pb2(CO3)Cl2
Size: 62 mm
Owner: Harvard University (Karabacek Collection)
Photographer: Malcolm Southwood

A large (62 mm) single crystal of brown, translucent phosgenite.  Photographs 2 and 3 show the crystal back-lit, to demonstrate the translucency and the yellow-amber internal reflections.


These very large phosgenite crystals from the first oxidation zone appear to have been restricted to a single find.  They were described by Goldschmidt and Thomson (1920), at a time when the deepest mining was on 6 Level, suggesting that this specimen originates from 6 Level or above.


This specimen is number 77 in the Karabacek catalogue.


Courtesy  of  the  Mineralogical  &  Geological  Museum  at  Harvard  UniversityPhosgenite; MGMH  ID# 93471, Tsumeb; Namibia. @ copyright 2012, President and Fellows of Harvard College. All rights reserved.