• WordNet 3.6
    • n vesuvianite a green or yellow or brown mineral consisting of a hydrated silicate; it occurs as crystals in limestone and is used a gemstone
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Webster's Revised Unabridged Dictionary
    • n Vesuvianite (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.
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Century Dictionary and Cyclopedia
    • n vesuvianite A mineral occurring in tetragonal crystals of a brown to green color, rarely yellow or blue. It is a silicate of aluminium, calcium, and iron, and was first found on Mount Vesuvius (whence the name). Also called idocrase and egeran. Xanthite, cyprine, and wiluite are varieties.
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Chambers's Twentieth Century Dictionary
    • n Vesuvianite a mineral allied to garnet, sometimes called pyramidal garnet, found in volcanic and primitive rocks, and so called because frequent in masses ejected from Vesuvius—also Idocrase
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In literature:

A variety of vesuvianite (idocrase) from California, described by Dr. G. F. Kunz as californite, was at first mistaken for jade.
"Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 2" by Various