the cushion cut sapphire claw set portrait, within an undulating border of round brilliant cut diamonds graduating larger at each end, mounted in platinum, signed 'MELLERIO', serial number 2744B, Mellerio workshop mark and French platinum control markLength of cluster 16mm
Width of cluster 13mmWeight: 6.5g
Art Deco diamond and sapphire oblong cluster ring, c.1920, set with an old lozenge cut diamond to a calibre cut sapphire ground and outer diamond border of old brilliant cut stones, diamond line shoulders extending up to the principal diamond, millegrain set, engraved anthemoin and laurel to half shank, lozenge pierced to gallery, serial number within the shank 3632