- Enter a word for the dictionary definition.
From The Collaborative International Dictionary of English v.0.48:
Vesuvianite \Ve*su"vi*an*ite\, n. (Min.) A mineral occurring in tetragonal crystals, and also massive, of a brown to green color, rarely sulphur yellow and blue. It is a silicate of alumina and lime with some iron magnesia, and is common at Vesuvius. Also called idocrase. [1913 Webster]