tiger's-eye


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tiger's-eye

[′tī·gərz ‚ī]
(mineralogy)
A yellowish-brown crystalline variety of quartz; a translucent, fibrous, broadly chatoyant gemstone that may be dyed other colors.
References in periodicals archive ?
The idea that tiger's-eye is a pseudomorph--a mineral in which crystals of one material take on the form of another, which it replaces atom by atom--held sway for more than 125 years.
Heaney expected to find that the quartz in tiger's-eye is chalcedony, a form that typically consists of fibrous, defect-riddled crystals less than 1 micrometer in diameter.
Fisher suggest that the crystal structure of tiger's-eye forms via a so-called crackseal mechanism.
In the tiger's-eye samples that Heaney studied, crocidolite fibers often ran parallel to the quartz columns.