Pyrite from El Potosi Mine, Santa Eulalia, Chihuahua, Mexico

This is the "flagship" specimen of this new update, a marvelous miniature-size jewel : the classic pyrite pseudo. after pyrrhotite crystals from Santa Eulalia. Doesn't look like a "rock," does it?
Dimensions: 6.5 x 4.6 x 5.9 cm
Species: Pyrite, pseudomorph after Pyrrhotite
Locality: El Potosi Mine, Santa Eulalia, Chihuahua, Mexico