MARGUERITE RING In two-tone gold, claw-set with a rare oval-shaped Kashmir sapphire weighing 5.69 cts set with old-cut diamonds. A diamond and 18k gold ring set with an oval shaped Kashmir sapphire weighing 5.69 cts. C.G.L. certificate stating: origin Kashmir, natural colour, no heat modification. S.S.E.F. certificate stating: origin Kashmir, natural colour, no heat. RC : Partially legible hallmark (?, B, a bird ? in a horizontal lozenge). Dimensions of the stone: 12.14 x 8.31 x 5.76 mm. TDD: 51 - 52; US: 5 3/4 - 6 (modifiable). Gross weight: 9.7 g (18k - 750).