Description:Vivianite is an iron phosphate mineral found in bladed crystals and clusters of an intense blue to green color. It can form in a variety of environments such as a sedimentary precipitate or in hydrothermal veins.RUSK COUNTY: Bladed clusters of tiny crystals of a deep green color were found in the oxidized zone of the Flambeau Copper Mine, near Ladysmith. (Buchholz, pers. com.)
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