Matrix of mixed sulfides, all iridescent! Pyrite is rough, Sphalerite is very sharp and attractive purplish, acicular crystals unidentified... look like Bolivian Zinkenite, but none has been identified from this mine; my guess is Arsenopyrite or Bismuthinite. The Fluorite is in penetrating cubes to about 1.5 cm. across; very pale pink & completely transparent. From the Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco