This is a very unusual ring. I have never seen a vinaigrette ring before. This one is fashioned of 14 ct gold (unmarked but tested), and it is a swivel ring. On one side is the cornelian, and the other side features a gold panel with holes. This part opens, and there is a piece of cotton inside. This would be to put smelling salts or so to revive the lady when she started to swoon, or even something that smelled good, when passing through the streets with all the dirty and unpleasant smells. The ring is a size 8, though it could be sized by someone used to working with antique pieces. It is circa 1840, and the top with the stone measures 1/2 of an inch North to South, and 3/8 of an inch East to West. The ring features a beautiful shank, and it weighs 3.63 grams. Again, is is a one of a kind piece.