Vintage Southwestern Heishi and Turquoise Nugget Necklace

Vintage Southwestern Indian hand beaded white heishi and turquoise nugget necklace on original cotton string. Has not clasp as it was designed to tie in the back. It is 23" long right now, but could be tied looser to make it longer. Beads range in length of 1/4" to 5/8" with the smallest at the back graduating to the largest in front. Weight: 35 grams. C. 1960-1970.