[D750] Impressive sapphire and diamond brooch, circa 1900

D750 Impressive sapphire and diamond brooch, circa 1900 Claw-set at the centre with a cushion-shaped sapphire weighing 30.70 carats, within a border of circular-cut diamonds, detachable brooch fitting, together with a later pendant fitting and chain, Austrian assay and partial maker's marks. Sotheby's ROYAL JEWELS FROM THE BOURBON PARMA FAMILY Auction, 2018.