PRETTY RING In white gold, set with a heart-shaped ruby weighing 6.15 cts, the shaped surround and shoulder highlighted with diamonds. A diamond and 18k gold ring set with a heart-shaped ruby weighing 6.15 cts. Copy of a Gübelin certificate stating: natural ruby (natural corundum), no heat modification. C.G.L certificate stating: origin Africa, no heat. RC : Flush chips and minor chipping. In a case. Dimensions of the stone: 10.23 x 12.39 x 5.91 mm. TDD: 54-55; US: 7 (changeable). Gross weight: 8.2 g (18k - 750).