RING A diamond and platinum ring set with an oval shaped ruby weighing 4.56 cts. A diamond and platinum ring set with an oval shaped ruby weighing 4,56 cts. G.R.S. certificate stating: origin Mozambique, natural "Pigeon's blood" colour, no heat modification. RC : Stone dimensions: 10.97 x 8.86 x 5.30 mm. TDD: 52; US: 6 (changeable). Gross weight: 7.1 g (Pt - 950).