Unidentified hallmark

[upnorth13]

Hi, I have used and loved this site-thank you! I have had many questions answered. I am new to your forum and I have never asked a question before. I was hoping that someone could help me identify this hallmark. I was told that it is Native American-I wasn't able to find a match to it. I have a small collection of NA jewelry that I have been able to identify but no luck on this one. The ring is very heavy @ over 30 grams and beautifully made. I am not sure about what all the stones are. Please let me know if you need any further information.
Thank you
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