A seller would bring these bracelets already cut for the artists, haven’t seen them done like this in some time. They always seemed to be Kingman or Chinese. Your second ring looks like some Danny Boy Turquoise I have seen before. The deep green I imagine is Turquoise Mountain (another Kingman stone). Not sure on the necklace could be a couple different things. Nice pieces.
Thank you for the info! Very interesting about the precut turquoise. I had a hard time getting the color right on the Sam Lovato brooch - it has more green than the photos show. The distribution and color of the matrix on that piece makes it one of my favorites. Would the lapidary work on the precut pieces be done by Native Americans or sourced elsewhere?