- tigereye
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/tuy"geuhr uy'/, n.tiger's-eye.
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or tiger's-eyeSemiprecious quartz gem displaying chatoyancy, a vertical luminescent band like that of a cat's eye.Bands of parallel, blue asbestos (crocidolite) fibres are first altered to iron oxides and then replaced by silica. The gem has a rich yellow to yellow-brown or brown colour and a fine golden lustre when it is polished. The best stones come from South Africa. See also cat's-eye.* * *
▪ gemalso spelled Tiger's-eye,semiprecious quartz gem displaying chatoyancy, a vertical luminescent band like that of a cat's eye. Veins of parallel, blue asbestos (crocidolite) fibres are first altered to iron oxides and then replaced by silica. The gem has a rich yellow to yellow-brown or brown colour and, when polished, a fine golden lustre. The best stones come from Griqualand West, S.Af. Hawk's-eye is similar to tigereye, except that the crocidolite was replaced by quartz before altering to iron oxide; it therefore retains the gray-blue or green of the asbestos. See also cat's-eye.* * *
Universalium. 2010.