TIFFANY (SETTING) RING In platinum, set on yellow gold claws with an old-cut cushion sapphire weighing 3.90 cts, set with baguette diamonds, the ring finely chased with arabesques and leaves. Signed. A diamond, platinum and 18k gold ring set with an old cut cushion shaped sapphire weighing 3.90 cts, mounted by Tiffany. S.S.E.F. certificate stating: origin Ceylon (Sri Lanka), natural colour, no heat modification. RC : Dimensions of the stone: 9.74 x 8.00 x 5.24 mm. Marks of cutting on the ring. TDD: 53; US: 6 1/2 (changeable). Gross weight: 8.60 g (Pt - 950 and 18k - 750).