Vintage Navajo Ring Sterling Petrified Wood Spondylus Sioux Chief Sz 6So finely crafted and interesting in subject is this vintage Navajo made ring featuring a Sioux chief carved from petrified wood with spondylus accent, circa 1950s. The handsomely made Indian ring consists of unmarked sterling silver with split shank, and a high profile carved cab of petrified a. k. a. agatized wood, in the form of a Sioux chief or warrior in profile with feathered headdress or war bonnet, and set in a sawtooth bezel with spiny oyster