online find: inlay ring with "RC, broken arrow, sterling" mark

Hi all-- I’m new to the group and so happy to join you! Below are three pics of a ring I picked up on ebay-- it reminds me of a journey from the clay soil, across the river and up a tree-covered mountain. The workmanship is unpretentious and there’s some nice attention to detail (the ring band itself has a hammered, decorative texture, the soldering is barely visible and rough edges have been smoothed down. Does this look like Navajo work? It would be great to learn more about the artist-- diligent online research hasn’t turned up anything. Unfortunately, don’t have any paper literature on hallmarks yet. What do you folks think?