Quiruvilca Mine (La Libertad Mine; ASARCO Mine), Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru
A remarkable Pyrite from the famous Quiruvilca Mine in Peru. This superb specimen shows exceptionally large, sharp, intergrown pyritohedra with wonderful metallic luster. Even though the periphery of the specimen is contacted, the back of the piece is partially crystallized(!), which is rare in my experience with larger Pyrites from this mine. Often, Pyrite is not found in crystals over a few inches, and a piece like this in such amazingly fine condition is certainly rare on the market. This piece was mined in the early to mid 1970’s.