What did I buy for 80 dollars!

[nala]

So the diamonds were tested and are authentic single cuts. The pawn shop who sold it to me said it’s set in silver. Wondering if this is an antique or reproduction? Also, does turquoise tarnish or rust like this?

 

[stracci2000]

This is so gorgeous!
Turquoise does not tarnish or rust, but it can change color because it is porous.
I think I see a little brownish color on the back. Maybe this is reconstituted/treated turquoise that has discolored due to age? Hard to say!
It certainly looks original to me. Maybe 1920's-40s?
Great find!!

 

[VRBeauty]

The brown spots on back could just be matrix stone, which would indicate - I think - that the stone is not reconstituted. Either way you have a lovely piece there, and probably a nice bargain to boot!