A well crystallised specimen of an uncommon North of England mineral, from the Carrock Tungsten Mine. The specimen of Arsenopyrite we have is an intergrown group of bright silvery crystals, some showing well developed chisel shaped terminations. The Arsenopyrite has grown on creamy areas of Muscovite, with a much later deposition of scattered micro-crystals of bright metallic Galena. A fine small cabinet specimen of Arsenopyrite from Carrock Mine.