From the find from 2002, this piece hails from a unique one-time find at the Estano Horco mine. This small cabinet specimens feature a few good size, relatively sharp, dark, lustrous, modified crystals of Sphalerite associated with very minor Pyrite on the back. The Sphalerite has a fantastic unusual "peacock blue-green" patina which is actually a Bornite "wash" that was seen on practically every specimen from this find.