Vintage Native American 12mm Turquoise and Sterling Necklace

This is an unsigned but vintage, authentic Native American turquoise necklace. The stones are icy cold and very heavy, color on bead holes is the same, industrial strength acetone did nothing. This is real turquoise, and you can see from the pictures they have the flaws in the stone that only real turquoise has. Hook clasp, the chain between is not original, someone made a spacer, not real silver either. The two silver hand made beads on the ends are real.
This necklace passed all of MY authentication tests with flying colors. However, I'm not an expert.
Never-the-less, I am utterly convinced this is a genuine article and an incredibly beautiful one at that. The colors have aged so nicely. Very wearable condition.