- Cabinet, 12.7 x 9.7 x 3.3 cm
- San Antonio de Calacalani mine, Cercado Province, Oruro Department, Bolivia
- Ex. Philadelphia Academy of Natural Sciences
A rich, showy, very fine specimen of this rare tungsten oxide hydroxide. Note that the location is our best guess translation of the label, based on published photos of tungstite from Bolivia from other collections such as Harvard.