Navajo Black Coral Parallelogram Raindrop Ring in Sterling Silver Size 7

Old Navajo ring in a parallelogram shape set with black coral. It has a hand hammered shank with cold chisel splits and raindrops at each split. Size 7 and the face measures 1 1/2" long. Some tarnish. Very rustic. Weight: 12.3 grams. C. 1930.