Vivianite

A 2.0 x 1.0 x 0.8 cm crystal of the hydrated iron phosphate, Vivianite, stands on a small matrix of limonite-coated Quartz. From the Trepča complex in Kosovska Mitrovica, Kosovo, this lead-zinc-silver district did once contain about forty mines and often the specific mine was not recorded, with only the name Trepča assigned to the specimen. This translucent crystal appears blackish-blue, but in transmitted light varies between a stunning iridescent electric blue and electric emerald-green. The upper section of the crystal is slightly bent to one side, this most likely occurring during extraction from in-situ.