NAVAJO STERLING SILVER, TURQUOISE AND CORAL CHIP-INLAY THUNDERBIRD NECKLACE BY THOMAS SINGER,Circa 1970s, "T" signature. Central hand-tooled thunderbird pendant inlaid with turquoise nugget, 3 in. high; surrounded by ten additional thunderbird pendants, 2 in. high; all on a hand-made double strand of sterling silver beads