0.28ct Diamond 18ct Gold Signet Ring

Vintage Diamond 18ct Gold Signet Ring Central grain set round brilliant cut diamond, measuring 4.2 x 4.3 x 2.36 mm, weight 0.28 metric carat, colour assessed H/I, clarity assessed I1 Grain setting in yellow to a square cut out collet "D" shaped cross sectioned yellow gold shank. Hallmark partially erased, stamped DOM with crown logo for gold. Tested as 18ct gold Weight 8.8 g Ring size: O Very good pre-owned condition