Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
Numerous photographed specimens in foreign collections, but it is doubtful that these really came from the Socavón/Salvadora mine - more likely originally labelled "Salvadora, Oruro" and wrongly interpreted as the Salvadora tin-silver mine in Oruro City whereas they are more likely from a different Salvadora, the copper-antimony mine in Yarvicoya - Alfredo Petrov
Socavón Mine, Oruro, Cercado Province, Oruro, Bolivia