Definition for CAT'S'-EYE

CAT'S'-EYE, n.

Sunstone, a subspecies of quartz, called in Latin Oculus cati or Onycopalus, from its while zones or rings like onyx, and its variable colors like opal. It is very hard and semitransparent, and from certain points exhibits a yellowish radiation, or chatoyant appearance, somewhat resembling a cat's eye. – Encyc. Cleaveland.

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