Gold tone metal in a THIN saucer design. Prong set large piece of polished blue -ish to green -ish to gray -ish stone that measures 1 3/4 inches. The under edge of one side has a roughness due to the natural stone. Doens't affect the appearance. Mild use to the metal is noted but, this fun piece is very appealing and wears very well! The clasping area is really nice, it allows you to choose from two fits, with a 1/4 inch sizing difference. Will fit a 6 through a 7.25 inch wrist. Ca., 1960.