Chalcopyrite

This is a fantastic example of the species with two dominant crystals up to 3.5cm and several interpenetrant smaller sister crystals. The brassiness with light reflection makes this a top pick. I have not seen any of this quality in the market in at least 10 years.

Locality: Recuerdo Vein, Huanzala Mine, Huanuco Department Peru

Composition: Copper Iron Sulfide