I bought this ring at a trading post in Colorado years ago. What is this chunky turquoise? Is “Tawa” a shop name? It has maker initials, but they’re partially blocked by the way the ring shanks are soldered on.
I’ve seen a few pictures of the hallmark online but none say what Tawa is, 
I imagine it is some manufacturer or shop name with the artist initials. Did a search and found a few of them, this one shows you the whole stamp.
@Jason thank you! Yes, seems to be the same. Most of what I saw seems to be similar…all in this same style with the gold wash. Seeming more and more like it may indeed be a shop name/trade style.
