Almost an inch across oval with a large, gorgeous piece of mother of pearl. Vintage. Stamped Mexico .925. ATI This would be gorgeous to layer with any other native pieces or anything sterling silver. The white and green flashes of mother of pearl will match with almost anything you decide to pair it with. No chain Trying to find homes for my mother's pieces so I don't have to have them sold for scrap. Ask if you have any questions and we can try to make a deal!