Copper ps. Aragonite
Corocoro District, Pacajes Province, La Paz Department, Bolivia.
At Corocoro, these copper after aragonite pseudomorphs are primarily found in two forms: single hexagonal crystals, and spherical aggregates of them. This is a very nice example of a the latter, reasonably well shaped with the individual hexagonal crystals somewhat visible. There is even a bit of redish patina, likely a micro dusting of cuprite.