Help identifying different types of spiderweb turquoise...

I recently purchased some vintage pieces including several rings. I love the spiderweb turquoise in particular. After researching some types, I was able to make possible i.d.'s on a few of them, but I keep second guessing myself! Any expertise in identifying certain mines / types of turquoise would be much appreciated. Also, if anyone knows the 3 artist marks pictured, info would be fantastic. Thanks so much.

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The AJ might be Alvin Joe. That sure is a pretty tray of rings.

The Bear Paw with LT is Lorenzo Tortalita. Nice rings!!

Thanks so much for both of those I.d.’s! They are much appreciated.

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