1. A variety of chrysoberyl that exhibits a luminous band of light (chatoyancy) when cut as a cabochon, resembling the eye of a cat.
Usage: gemology; also called cat's-eye

Examples

• The jeweler selected a cymophane stone for the ring because of its distinctive optical effect.
• Cymophane is prized by collectors for the sharp, moving band of light that appears across its surface.
• The cymophane in the pendant displayed a bright chatoyant effect when rotated under sunlight.
• Unlike regular chrysoberyl, cymophane exhibits the cat's-eye phenomenon due to its fibrous structure.
• Gemologists often recommend cymophane as an affordable alternative to more expensive cat's-eye stones.