A geometric gem-set collar necklace in 18ct yellow gold; comprising a series of hinged abstract geometric links in sandblasted finish, collet-set with octagonal portrait-cut sapphires alternating with navette-cut emeralds, completed with an integral tongue clasp, signed 'B. Jacot' for Bernadine Jacot, London assay marks, overall length 40.0 cm, in a B M Bijoux case, 198.8 grams.