Cassiterite with Quartz and Calcite

Viloco Mine, Loayza Province, La Paz Department  Bolivia

Specimen size: 10.6 × 10.1 × 3.2 cm = 4.17” × 3.98” × 1.26”
Main crystal size: 1.6 × 1.5 cm = 0.63” × 0.59”