18ct white gold, 'Orion' blue sapphire and diamond necklace. The necklace features an oval-cut blue sapphire drop, surrounded by a double halo of brilliant-cut diamonds, with four blue sapphires, two oval-cut, one pear cut and one cushion-cut, total estimated sapphire weight 6.51 carats, surrounded by diamonds, total estimated diamond weight 3.08 carats on a double chain centrepiece with bright cut Omega collier extensions, completed by a parrot clasp, length 430 mm, gross weight 14.93 grams.