We have all seen hundreds if not thousands of pyrite specimens.  Most of the Peruvian ones come from the Huanzala mine, where miners haul them out in 50 kg sacks.... that is exactly why it is so hard to find a good one: few are good to begin with, and of those most end up damaged or broken while being pulled out. I visited the mine and looked through hundreds of specimens, virtually all were damaged.  I did however find a few very fine examples, 6 of which are posted on this page.  The locals subdivide the pyrites into several categories: "chispas" are the low grade pieces you see for sale in various rock and gift shops Dodecahedrons are called "cocos" (coconuts) and cubes are called "cubos".  The rarest and most prized, "triangulos" are the octahedral crystals that are only recovered every few years at best. This is a beautiful octahedral crystal, with minor barite.  There is a contact at the base, but all of the main crystals are intact-- something truly rare. As you can see from the pictures, this means that it can be displayed from multiple angles. What I"m trying to say with all the lines above, is that this is NOT your ordinary pyrite.