Three stone Old mine cut diamond ring (1.91ct) set in 18ct white gold & platinum, marked 18ct Plat, Old mine cut cushion 6.17 x 6.2 x 4.9 est =1.25ct, 2x old mine cut 4.7 mm each = 0.33 each. Total diamond weight = 1.92ct estimated. Si-P clarity, ring size O, weight 5.77 grams, ring size Q. The diamonds are circa 1880-1910 the ring 1960s