Womans Bangle Bracelet 2 1/4" Opening

Pictures do not do this Bracelet justice. The diamond cutting has nice sparkle when light hits it. Don't know metal or maker. A mark inside but not sure what it is, very faint. maybe pewter it looks that color. 2 1/4" opening across center. Comes with box and dust bag forgetting or giving. It is in great condition and is Vintage.