Is this Zuni?


I’m new, but have been obsessed with collecting Native Anerican jewelry for three decades!

I was wondering if anyone can tell me who “G Sterling” hallmark would be and what those strange colored stones may be on the sides of this bracelet.
I believe it may be some kind of paste material but can’t be sure.
Anyone know a date or if this piece is authentically Zuni?
Thanks for any help!