The St Andrew Jewel of the Order of the Thistle is a gold and silver locket suspended from a ribbon that contains an oval piece of chalcedony into which is carved a cameo figure of Saint Andrew. The cameo is bordered with 12 diamonds. Inscribed on the back is the Order's Latin motto: NEMO ME IMPUNE LACESSIT, meaning "no one attacks me with impunity". Inside is a miniature portrait of Princess Louise of Stolberg-Gedern, wife of Prince Charles Edward Stuart, the elder son of James VII. The object is variously of English, French, Italian and Dutch origin, was altered several times, and measures by .