Southwestern Turquoise Nugget Bead Necklace with Outstanding Tiger's / Hawk's Eye Bead

VIntage Navajo made turquoise nugget beaded necklace with sterling silver clasp. The pendant bead at the center is an outstanding feldspar stone that has Golden tiger's eye on one side and silver hawk's eye on the other. The chatoyancy forms a "Z" in one area. Just awesome. This bead is 16.1 mm in diameter. (Measured with caliper) Weight: 28.5 grams. 

This came from an estate with two other necklaces. Here they are together: