A Ring 500/1000 platinum set with an emerald cut with an approximate weight of 145 ct and 2 diamonds in bright talhe with an approximate total weight of 0.64 ct Portuguese Lisbon mark (1938-1984) Dimensões (altura x comprimento x largura) - 21 (16,5 mm) cm; Peso - 4,7 g. Notes: Provenance: Jewelry collection of a soprano opera singer of the São Carlos National Opera House, Lisbon.