two channel set lines of sugarloaf cabochon sapphires with a triangular cluster at either end set with liens of diamonds an calibre onyx forming a 'key' pattern, the point terminals each set with a triangular cut diamond, mounted in platinum, French assaymark to pin, French workshop mark to pin Length 6.2cm / 2 5/8''
Width 1.4cm / '' Weight: 12g
Early 20th century diamond and onyx bow brooch by Cartier, London c.1920, of double loop design with central line of graduated old brilliant cut diamonds,