Vintage signed Navajo sterling silver pendant and chain necklace. It is marked sterling on the back and it does have a hallmark, but there is smooth wear and I cannot make it out. 

The lapis lazuli stone is very vibrant and fine. Pendant measures 1 3/8” long with the oversized bail. It is 21mm wide. The chain is 18” long. Weight: 7.5 grams.