With a lovely clear hallmark for 9ct Gold applied in the Chester Assay Office (which closed in 1962), this pretty Edwardian ring in the everso fashionable 'Navette' style prettily set with faceted white Pastes surrounding an elongated Turquoise glass all claw set, enhancing the floralesque design. 

A ring size 'P' or '8' it could easily be sized to suit.