Vintage Turquoise Choker Silver Necklace 18" Chain

This is a beautiful vintage turquoise necklace in great condition. It does have a few blemishes but nothing major. There is a slight ding in the chain coil but still so nice. I don't know the origin or the type of the metal or stones used. For all I know, it may be just costume jewelry but it is very beautiful and a great unique piece.