<p><strong>Adjective</strong></p><ul><li>Changing in luster or color</li><li>Chatoyant silk</li><li>Reflecting a single streak of light when cut in a cabochon</li></ul><p><strong>Noun</strong></p><ul><li>A cabochon-cut gemstone having this reflected streak, as a chrysoberyl cat's eye</li></ul>