Cat's-Eye

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Cats eye.jpg

Cat's-Eye is an optical phenomenon (also known as chatoyancy) whereby light reflects back off a gemstone, cut en cabochon, as a single ray. Extremely fine parallel inclusions in the gemstone cause a silvery ray to appear perpendicular to the orientation of the inclusions.

Cat's-Eye is also often used to refer to the cat's-eye variety of Chrysoberyl.

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