One of a kind - how to valuate?

Asked for help identifying artist…also curious about value. Any assistance greatly appreciated.

Depending on the artist and if that is a real amethyst, I would think between $150 and $300. Humble opinion and would defer to the pros.

I’m not completely sure it’s Native American. I am basing this on the bezel holding the stone in and on the fact that there is an opening behind the stone (interior of cuff). I have a Native American amethyst cuff and the back is closed.
Despite all of that, it’s a nice cuff. Please also know that I am not an expert and I’m basing my opinion on my jewelry.