Tetrahedrite (silver rich variety) with Chalcopyrite and Quartz

Pulacayo Mine, Huanchaca, Antonio Quijarro Province, Potosí Department  Bolivia (± 1925)

Specimen size: 6.7 × 4.7 × 2.3 cm = 2.64” × 1.85” × 0.91”
Main crystal size: 1.6 × 1.4 cm = 0.63” × 0.55”