Vintage Pendant Green Turquoise - Any Ideas

This stone is definitely untreated - is about the size of a silver dollar - this photo is very true to color - stunning to hold!!!
Any ideas on the mine - It’s interesting to ask around, always differing opinions, but all fun - have been told green Bisbee and Carlin mine and Carico so far…

It is a very interesting rock, I don’t think carico, but you never know, mines can produce so many different looks. Whatever it is, it is definitely an eye catcher.