- Siglo Veinte Mine, Llallagua, Bustillos Province, Potosi Department, Bolivia
- Cabinet, 12.6 x 9.3 x 4.5 cm
- Ex. Philadelphia Academy of Natural Sciences
This important large, museum-sized specimen has lustrous, brilliantly metallic bismuth crystals exposed in massive ore matrix. The crystals reach 3 cm in size! The left half of the specimen is also crystallized around on the backside as well. This is a major Bolivian native bismuth specimen, I think.