- Bournonite, Pyrite
- Small Cabinet, 6.0 x 4.0 x 2.3 cm
- Quiruvilca Mine (La Libertad Mine; ASARCO Mine), Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru
Lustrous, brassy, columnar, blocky and flat-topped bournonite crystals characteristic of the 1980s finds at Quiruvilca are richly and aesthetically scattered on the sculptural pyrite matrix. Ex. Tarnowski Collection.