Pyrrhotite

Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (±2007)

Specimen size: 4.1 × 3.3 × 1.7 cm = 1.61” × 1.30” × 0.67”
Main crystal size: 2.7 × 2 cm = 1.06” × 0.79”