CHOPARD CHEVALIERE In smooth and satin-finished yellow gold, set with an oval-cut ruby weighing approximately 7.50 cts, the ring adorned with a cameo of spinels. Signed. TDD: 58; US: 8 1/2 (not subject to change). A spinel and 18k gold ring set with an oval shaped ruby weighing approximately 7,50 cts, by Chopard. RC: Stone dimensions: approx. 15.9 x 11.2 x 6.0 mm. Gross weight: 22.0 g (18k - 750, mark exempt).