I was told this was coin silver. It is not marked so I have tested it with acid with a positive result for sterling silver. It has gorgeous designs with eyes, arrows and a little bird on each side.
I believe the style is called snake eyes, The turquoise is approx 5MM and they are bezel set with rope edging and set into what looks to me like a flower setting with sterling beading. It is about 1/2' wide on the top and tapers smaller toward the back. Lots of the original finish remains.