Early Rectangular turquoise Ring in Sterling Silver Navajo Size 5

Vintage Fred Harvey era hand made Navajo sterling silver ring. It is set with a natural blue nugget turquoise stone that is rectangular in shape, which was very popular in the 1920s and 1930s. One corner has a gap between the stone and the bezel and it appears that there may have been a quartz inclusion that fell out. I've seen that before.

Nice raised edging around the bezel.

Size 5 Measures 1 1/8" by 5/8". Weight: 5.4 grams.  Marked sterling on the back. Tarnished and has patina.