These pyrite, quartz and sphalerite crystals are from the Huaron Mining District of the Huallay District, Pasco Department, Peru.This area contains 15 mines including the Alimon which is where most mineral specimens come from. The mines are large commercial operations for the extraction of silver and silver related minerals. Twenty-one different mineral species are found in this area including several exceptional sulfides such as pyrite and sphalerite. This specimen consists of a combination of; bright golden pyrite crystals, transparent quartz crystals, and black sphalerite crystals.The piece is well balanced and aesthetic. It measures 3 x 2 5/8 x 1 5/8 inches or 76 67 x 41 mm.