Calcite with Pyrite

Dalnegorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region  Russia

Specimen size: 9.6 × 8.6 × 4.7 cm = 3.8” × 3.4” × 1.9”
Main crystal size: 4.2 × 3.3 cm = 1.7” × 1.3”