LARGE RING In yellow gold, set with a beautiful oval-shaped sapphire weighing 8.23 cts, the basket set with tapered and round diamonds. A diamond and 18k gold ring set with an oval shaped sapphire weighing 8.23 cts. C.G.L. certificate attesting: origin Ceylon (Sri Lanka), natural intense blue colour, no heat modification. RC : Stone dimensions: 13.2 x 10.7 x 6.3 mm approx. TDD: 51/52; US: 6 1/4 (changeable). Gross weight: 7.0 g (18k - 750).