This is a great looking pair Vintage Cufflinks, measuring approx 1" X 3/8" at their widest, and are not marked! Should polish up nicely! Sorry, I do not know if the stones are natural or synthetic! Neat Cufflinks! Launched from my store - Powered by Highwire.com Track Page Views WithAuctiva's FREE CounterEvery buyer gets a MyStoreRewards invitation for cash back