$500.00 €429 £390.00 approx. This specimen is priced in US dollars, all other prices are approximate.
A matrix-free pseudomorph of Limonite after cubic Pyrite crystals. The larger crystal measures 3.2 x 2.7 x 2.0 cm with a smaller, 2.0 x 1.9 cm, part crystal formed on top and in axial alignment to the primary crystal. The pseudomorphed crystals are sooty black with a part-metallic sheen, this is probably Goethite, with most of the faces coated in a reddish light-chocolate-brown Limonite.