centred by a principal round brilliant cut white diamonds, in an open frame of calibre cut sapphires with four round cut yellow diamond accent stones, the sapphire circle overlapping outer circles set with calibre cut rubies, emeralds and circular cut yellow diamonds, white diamond crescents in between, the gallery with engraved scroll band, mounted in platinum and gold Width 3.2cm / 1 5/16'' Weight: 15g
Late 19th century / early 20th century 'Noeud Louis XVI' diamond openwork ribbon bow brooch by Cartier, Paris c.1902, the loops and ribbon ends centred by alternating single stone and quatrefoil clusters,