Jewellery, Watches and Objects of Vertu to include the personal archive of Louis Osman, goldsmith and architect

An emerald and diamond dress ring, claw set with rectangular step-cut emerald, within a flower head design, set throughout with brilliant-cut diamonds, to a raised wirework mount, white precious metal mounted, unmarked to shank, emerald measures approximately 10mm x 9mm, ring size K. £500-600