The Family Jewels site in Australia has your #1 ring listed as from Laura Quam (Zuni) at $159.00. I have no way to confirm this however. Needs more research.
The cheifs head ring is machine cast, not hand made. It’s possible that the initials are of the person who inlaid it; it’s also possible that the initials stand for a commercial shop, or were placed there to intentionally mislead buyers into thinking it’s a Native handmade piece. The inlay is block (plastic), and likely not done by a Native American. There’s a good chance it’s from overseas.