FINE CHAIN In white gold, holding a flower pendant set with an old-cut round diamond weighing approximately 1.30 ct, highlighted with small brilliant-cut diamonds. A diamond and 18k gold necklace set with an old cut round diamond weighing approximately 1.30 ct. RC : Stone size: 7.3 - 7.4 x 4 mm approx. Estimated colour: J. Estimated purity: SI. Chain length: 43.5 cm. Pendant size: 2 x 1.3 cm. Gross weight: 4.2 g (18k - 750).