Large Native Amer. Silver Malachite,Turq/Abalone Ring!!

Another Amazing Vintage Treasure! Great Artistic Native American Hand-crafted, possibly Sand-cast Silver ring measures size 9, fits very comfortably features a nice nugget of Turquoise a lovely nugget of Malachite and a bezel set oval of Abalone shell... Awesome Artist Representation of Nature, Wilderness, Islands Lakes, Trees, Ponds, ... great inspired feeling emote from this 1.5" tall statement... I am sure it is SIlver, however I cant read the marking??