Pyrite is mined by the ton in Peru, but really standout specimens worthy of a good collection are still exceptional. This is one of those, and it has it all! First, the pyrite crystals are ringed around a central quartz-filled recess, which gives the specimen very unusual "structure" compared to the normal plate of wall-to-wall crystals. Secondly, the crystals have the absolute top mirror-brightness to them, some of them with pretty micro-terracing on their faces. Small sphalerites are sprinkled here and there amongst the pyrites.