Calcite

Verkhnii Mine, Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai  Russia

Specimen size: 3.7 × 1.7 × 1.2 cm = 1.46” × 0.67” × 0.47”
Main crystal size: 2.6 × 1.2 cm = 1.02” × 0.47”