I am trying to find the name of the artist and hallmark on a 40 plus year old ring.it is a mens silver with a larger turquoise stone.it has feathers on the side and underneath the initials RO on top of what appears to be an anvil.who is ro and what does anvil mean.any help appreciated thanks

Suggest you take it to a jeweller, or post a picture here, but doubt we can help you with this. Where is the ring from?

I have a hard time looking up individual Native American hallmarks but these are the sites I use when I am able to look them up.

https://www.google.com/search?q=Native+american+hallmarks&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=fflb