I need help identifying the artist who created a necklace I just purchased. The initials are NRJ. I think it may be Navajo. I do appreciate any help you can give me. Thank you.

I need help identifying the artist who created a necklace I just purchased. The initials are NRJ. I think it may be Navajo. I do appreciate any help you can give me. Thank you.
This might be a tough one to id. I looked in the easy places and found nothing. Your necklace is that age where if the artist didn’t continue working into the internet age and mostly made jewelry during the boom and then stopped, they are hard to identify.