This pyrite is from the Huanzala Mine, Huallanca, Dos de Mayo Povince, Huanco Department, Peru. This a predominately lead-zinc mine but 63 other mineral species can be found there. It is one of the premier locales for pyrite specimens. They can vary in morphology from cubic to dipyramidal octahedrans and every combination in between. It is a sulfide containing the elements Fe and S. This piece is double sided with modified cuboctahedral pyrite crystals on both sides and the top. One side has druse quartz crystals mixed with the pyrites. The pyrite crystals have a bright gold color and metallic luster. The largest crystals are about 15 mm across. This piece measures 2 1/2 x 2 x 1 1/8 inches or 64 x 50 x 28 mm.