within a box collet, raised on a shaped square cluster of round brilliant cut diamonds, tapering at the sides to the shoulders, with beaded and engraved leaf detail, the gallery with scroll detail, mounted in platinum, stamped 'IRID PLAT' within the shankLength up panel 1.2cm / ½''Weight: 5g
Antique cushion cut diamond cluster ring, c.1800, the principal diamond, later recut, bordered by eighteen small cushion cut diamonds, close cut down collet set in silver and gold with gold tapering flat shank