Cuprite

Poteryaevskoe Mine, Block 2-1, ↓100 m., Rubtsovskoe, Rudnyi Altai, Altaiskii Kray, Western-Siberian Region  Russia (06-08/2008)

Specimen size: 3.3 × 3.2 × 2.5 cm = 1.3” × 1.3” × 1.0”
Main crystal size: 2.2 × 1.6 cm = 0.9” × 0.6”