Good Afternoon & I hope All is Well! Can Please Tell me if this are Native American? TY

Good afternoon! I have these earrings and they are turquoise and opal. In the back it has sterling on one earring and on the other it has MY. I am hoping some one will be able to tell me if these are native American. Thank you in advance for all your responses and have a wonderful and safe day.

It is cast silver, the turquoise looks like it is possibly block with synthetic opal. It would be a difficult call to say they are imported, possible that they are manufactured here in the states with Native American craftsmen.

Thank you so much for responding and your help. I also would like your help if possible on this piece. I don’t know the maker and I hope you will recognize the mark. Thank you
AA (1)

AA (3)
AA (4)