A Ring 500/1000 platinum set with a oval cut Ceylon sapphire with an approximate weight of 5.50 ct. and 38 brilliant cut diamonds with an approximate weight of 1.80 ct. Portuguese, signs of use Lisbon mark (1938-1984), Virgílio Júlio da Costa Correia maker's mark (1935-1948) Dimensões (altura x comprimento x largura) - 12 (16,5 mm) cm; Peso - 10,9 g. Notes: Provenance: Jewelry Collection of a Soprano of the São Carlos National Opera House, Lisbon.