Viv"i*an*ite (?), n. [So called by Werner after the English mineralogist F. G. Vivian.] (Min.) A hydrous phosphate of iron of a blue to green color, growing darker on exposure. It occurs in monoclinic crystals, also fibrous, massive, and earthy.

Viv"i*an*ite (?), n. [So called by Werner after the English mineralogist F. G. Vivian.] (Min.) A hydrous phosphate of iron of a blue to green color, growing darker on exposure. It occurs in monoclinic crystals, also fibrous, massive, and earthy.