noun
cat's-eye (semiprecious stone)
A semiprecious gemstone exhibiting chatoyancy, often used in jewelry. The term 猫目石 (ねこめいし) is a more common synonym.
See also: 猫目石
彼女は猫睛石の指輪をはめていた。
She was wearing a cat's-eye ring.
猫目石 is the more common and accessible term for cat's-eye; 猫睛石 is a rarer, more technical or literary variant.
From Chinese 貓睛石／猫睛石 (māojīngshí), literally 'cat's eye stone'. The Japanese reading びょうせいせき is the on'yomi of the characters.