Pat - Mountain View, California M207 Chalcopyrite Pyrite Commonly called Peacock Ore due to the beautiful coloring. These specimens are from Mexico. Beautiful irridescent colors in these specimens. Excellent for cabbing, tumbling, or specimen. Reds, browns, cream, blue, green, grays.
Some pieces have druse spots on the outside.
Some have chalky-like crust on the outside with nice, colorful chert on the inside. Andalusite crystals with graphite inclusions, which is then called Chiastolite. These nice specimens of Chiastolite are from China. These crystals are from China. Several sizes to choose from.