Near perfect cubes of Pyrite from a mine in Navajún, La Rioja, Spain. These natural crystals have not been carved, cut, or polished and are shown just as they came from the earth.

Near perfect cubes of Pyrite from a mine in Navajún, La Rioja, Spain. These natural crystals have not been carved, cut, or polished and are shown just as they came from the earth.