This is a beautiful ring from the 1920s. It is sterling, as marked. The center is a rectangle moss agate stone that is prong set. Surrounding the some are marcasite, all of which are still intact. The ring is a small size. The band is slightly bent so it was difficult for me to get the exact size, but I think it is a 4. The too measures approximately 1 inch long and 3/4 inch wide.