18 Kt gold ring vintage old 1900 you and me diamond ruby Numbered. Ring, 1900 commonly called you and me ring. This ring is in gold, two-tone, 18 carat, hallmarked 18 carat and also numbered, tested with appropriate acid. It is set with two small diamonds and a small ruby. A tiny piece is missing on one of the two small diamonds, very difficult to see because it is extremely small. I didn't really manage to take a photo of it, but that doesn't spoil the beauty of the jewel. The French size is 54. FR. The ring weighs 2.6g.