Chaumet Necklace in white gold, diamonds and blue chalcedony drop, set with four blue sapphires and two violet sapphires with a total weight of thirty-one carats.Chaumet Necklace in white gold, diamonds and blue chalcedony drop, set with four blue sapphires and two violet sapphires with a total weight of thirty-one carats. Biennale des Antiquaires 2012