Ferberite

Mount Chambillaya mining district, Quime, Inquisivi Province, La Paz Departament  Bolivia

Specimen size: 2.6 × 1.9 × 0.9 cm = 1.02” × 0.75” × 0.35”
Main crystal size: 2.6 × 1.9 cm = 1.02” × 0.75”