the box it came in said sterling but it isn't stamped so i am going to say silver tone...it passes the jeweler's quick test in that it doesn't attract to a magnet
not all sterling silver has to be stamped it could have been made by someplace that doesnt stamp their jewelry if you want to know if something is real or not shave a little of the band back and its a sure fire way of being able to tell and copper is the metal that isnt attracted to a magnet