Vintage Navajo Beaded Necklace with Brown Heishi and Turquoise

Vintage Navajo beaded necklace. It is strung with graduated brown heishi. THe beads have diameters from 3.4mm to 9.7mm. The white beads are conch shell and the turquoise beads are natural with lots of matrix. Round metal beads are sterling silver hogans that are very tarnished. Necklace is 19" long,Wright 50 grams.