Vintage Signed Navajo Sterling Silver Foot Ring with Bi-colored Chrysocolla 6.5

Vintage 1960s signed Navajo sterling silver ring set with bi-colored chrysocolla. It is a size 6.5 Face of the ring is 3/4" long. Hallmarked on the back. Acid tested sterling silver. Weight: 4.8 grams. Some tarnish.

(Plant is euphorbia lactea variegata)