Pyrrhotite with Sphalerite

Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua  Mexico

Specimen size: 3.7 × 2.3 × 2.1 cm = 1.46” × 0.91” × 0.83”
Main crystal size: 1.2 × 0.7 cm = 0.47” × 0.28”