I was given this necklace. It’s quite large/heavy(included a quarter for scale), seems to be very well made, the stones are very consistent. All and all it’s a real stunner. A friend of mine suggested that any “really good” Native American jewelry should have a signature/mark. This has no marks whatsoever. I was wondering if anyone had any information or thoughts on the piece and whether the lack of a mark or signature is significant. Thank You!