Vivianite

Vivianite

Vivianite,   Fe2+3(PO4)2 .8H2O   is a hydrated iron phosphate mineral.  The   specimen is composed of  radiating dark stellate crystals of vivianite with a hint of dark blue,  which are mounted on a rock which also has botryoidal manganese oxides. The specimen is from the Kerch iron-ore basin,  Eastern Crimea, Ukraine.