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. SSEF certificate stating: origin Burma (Myanmar), no heat. RC : Stone dimensions: 13.60 x 10.60 x 5.70 mm approx. Minor oil impregnation. Small chip. TDD: 54; US: 6 3/4 (slightly changeable). Gross weight: 15.8 g (Pt - 950).