cat's-eye


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cat's-eye,

gemstone that displays a thin band of reflected light on its surface when cut as a cabochon. Its name is derived from its supposed resemblance to the eye of a cat. The optical effect, known as chatoyancy, is caused by the reflection of light from very thin, closely spaced filaments in parallel arrangement within the stone. True cat's-eye, a variety of chrysoberylchrysoberyl
[Gr.,=golden beryl], a beryllium aluminate used as a gem. It has a vitreous luster and is transparent to translucent. The more valuable cat's-eye is a variety of chrysoberyl. Another variety, alexandrite, was first discovered in the Ural Mts.
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 from Sri Lanka and Brazil, is the most valuable, but some quartz, tourmaline, and a few other minerals that display chatoyancy are also used as gems. A golden-yellow species called tiger's-eye is a form of quartz that contains crocidolite asbestos.
References in periodicals archive ?
11 -- color) Nine west reinterprets the '50's cat's-eye shape with a slightly squared-off design, but other designers are going totally retro with exaggerated shapes and rhinestone trim.
The coloured cat's-eyes will switch off when lights are green but flash twice every second on amber until they turn to red.
Jayne Goodrick, 34, from Rhyd-y-foel, in North Wales, was thrown from her bike on the Ruddlan to Abergele road because the cat's-eye had been set too high after resurfacing.
Scarlett O'Hara had 'tude for her time, but today we'd put her in some green cat's-eyes instead of those draperies.
Owner Ed Foster said the store caters to nostalgia fans with brand-new merchandise like cat's-eye sunglasses and poodle skirts as well as official Route 66 designs sporting the highway shield on earrings and belt buckles, embroidered logos on shirts and hats, and tapestry designs on vests.
Today's find is a pair of pink cat's-eye glasses, the quality you'd find at a trendy optician's store.
They team up with slinky one-shouldered dresses in clingy polyester jersey, silvery alien-eye sunglasses or maybe '50s style cat's-eye shades with pink velvetlike frames and a nonshiny vinyl jacket.