between baguette cut diamond shoulders, mounted in platinum, signed 'CHAUMET' within, Chaumet workshop mark to back of shank, French assaymark for platinum, accompanied by GIA report no. 6223770879 for the 6.37ct diamond giving the E SI2 grade and the diamond shows no fluorescenceDiamond 10.73 x 10.00 x 7.29Weight: 5.5g
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