Early Art Deco round brilliant cut diamond and square panel cluster ring, c.1920, set with an old European cut diamond

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 shank.
Weight: 5g

2.01ct D VS1