- Penfieldite, Boleite, Cotunnite
- 10 km from Sierra Gorda Station, Antofagasta, Chile
- Cabinet, 12.8 x 7.9 x 6.4 cm
ex. Dr. Mark Feinglos Collection A rich and large specimen of these rare species, from new finds in Chile. There are veins scattered all over the specimen, with interesting study material thorughout.