18ct white gold, sapphire and diamond necklace, composed of a graduated line of 37 claw-set round, oval or cushion-shaped sapphires together weighing 58.24 carats each framed by a border of similarly-set brilliant-cut diamonds together weighing approximately 10.78 carats, completed by a concealed clasp, inner circumference approximately 430 mm. Accompanied by a Gsl gemstone authentication report numbered AA64641, dated 2 February 2021, stating that the sapphires totalling 58.24 carats are natural, of Burmese origin, with no evidence of heat treatment identified.