Calcite with Pyrite (RARE locality specimen)

Item Description

A showy and hard to find association specimen from the lesser-known Bismark Mine in Chihuahua, Mexico featuring scalenohedral crystals of Calcite which transition from a silvery-golden hue to a stark white shade mesauring up to about 1.0 cm, associated with oxidizied Pyrite showing hues that range from a rusty color to a "peacock" iridescence. There are some contacted crystals, so the piece is not completely pristine, but if you collect Mexican minerals or worldwide Calcites, this something that is seldom availabe due to the rare locality.
Ex Les Presmyk / De Natura specimen.