RING In yellow gold, set with a beautiful octagonal emerald weighing 5.87 cts, shouldered by two troïda diamonds. A diamond and 18k gold ring set with an octagonal shaped emerald weighing 5.87 cts. C.G.L. certificate stating: origin Colombia, impregnated with minor oil. RC : Hallmark: M?. L., a mushroom ? In a horizontal rhombus. Probably Marcel LAMOURET in Nice. Dimensions of the stone: 16.62 x 10.34 x 8.42 mm. TDD: 54 - 55; US: 7 (changeable - internal ring). Gross weight: 9.6 g (18k - 750).