GRADUATED PYRITE SET Ampliación a Victoria Mine, Navajún, La Rioja, Spain Piritas de Navejun is the only locality that regularly produces "floater" crystals of Pyrite showing "pure" cubic form. The owner of the mine sometimes sorts thru 1000's of Pyrite cubes & assemble a set in graduated sizes. This set contains 72 almost identical examples of those brassy, metallic treasures. They would be identical, but for their size. The smallest measures 1.6 mm and the largest comes in at 5.04 cm.