A Ring 800/1000 gold set with 4 navette cut diamonds with the approximate weight of 0.60 ct. colour degree M and clarity VVS~SI and 1 brilliant cut one with approximate weight of 0.70 ct., colour degree S~T and clarity SI3, medium and intense fluorescences Portuguese signs of use Oport mark (post-1985), unreadable maker's mark Dimensões (altura x comprimento x largura) - 14 (17 mm) cm; Peso - 3,3 g. Notes: Provenance: Jewelry Collection of a Soprano of the São Carlos National Opera House, Lisbon.