Lot 508 , A sapphire and diamond cluster ring

A sapphire and diamond cluster ring, claw-set with an oval sapphire measuring approximately 12.6 x 10.5 x 5.5mm, weighing 7.97 carats, within a border of single-cut diamonds totalling approximately 0.30 carats, mounted in bicoloured gold, size O, Italian maker's mark, stamped 375, gross weight approximately 4.5 grams
£2,500-3,500