BOUCHERON BEAUTIFUL "KNOT" RING In platinum, set with an oval-cut ruby weighing approximately 6 cts, the shoulder enhanced with two lines of baguette-cut diamonds. Signed. A diamond and platinum ring set with an oval shaped ruby weighing approximately 6 cts, by Boucheron. S.S.E.F. certificate stating: origin Burma (Myanmar), no heat, minor oil. RC : Small chip. Dimensions of the stone: 13.60 x 10.60 x 5.70 mm approx. TDD: 54; US: 6 3/4 (slightly changeable). Gross weight: 15.8 g (Pt - 950).