A vintage Sapphire and Diamond ringA beautiful vintage cluster ring featuring an oval mid blue sapphire (approx. 7 5 mm), securely claw set at the centre. Surrounded by a halo of twelve old brilliant cut white diamonds (approx. 2 mm each, total estimated diamond weight ~0. 35 ct), the piece is classically elegant. The head of the ring tests as platinum and measures approx. 13. 5 10. 7 mm, with a depth of 5 mm. The band tests as 18 carat yellow gold and is stamped 18CT PLAT, consistent