(Mina Santa Rosa)
Old Ag mine, active during I.Domeyko journey to Elqui valley, around 1870-1880 aprox.
According to him, this mine, produced fine mm. xls of perfect tiny hexagonal Polybasite.
Ref.:
Domeyko I. (1876); "Mineralogía", Vol. II, Edit. Ferrocarril, Stgo de Chile.