The well made antique cufflinks do not have a metal mark but were tested with nitric acid and a "kee" tester to be 14k solid yellow gold with platinum circles on the front. The platinum holds a total of 8 round small rose cut natural diamonds. The cuffs weigh 10.5 grams. Set below the platinum is wonderful guilloche blue enamel. The cuffs are 3/4" in diameter with a chain link toggle on the backs. The enamel has no damage.