RING In gadrooned yellow gold, set with a round old-cut diamond weighing 2.33 cts set with two cabochons of rubies, the setting gadrooned. TDD: 54; US: 7 (slightly changeable). A ruby and 18k gold ring set with a round old cut diamond weighing 2.33 cts. RC: L.F.G. certificate attesting: K colour, SI1 clarity. Stone size: 8.23 - 8.43 x 5.58 mm. Gross weight: 13.5 g (18k - 750).