A sapphire and diamond set brooch, by Gübelin, the abstract openwork ‘ice’ design brooch pavé set with brilliant-cut diamonds and accented with raised claw set marquise-cut diamonds, around a central irregular tiered cluster of claw set round-cut sapphires, mounted in white precious metal, stamped ‘750’ and bearing maker’s mark, total weight of marquise-cut diamonds approximately 2.1 carats, brooch length 69mm. £2200-2800