Trying to identify who made my mom's squah blossom necklace

[Cfarris_72]

[nanc9354]

Gorgeous. Beautiful stones. it looks like it has 2 hallmarks. Just a guess….Anna Begay & Jimmy Yazzie. Indian Native American hallmarks J Welcome!

[Steve]

[fernwood]

Such a beautiful necklace.
Do the experts hear think that the pendant was an addition?