Please ID possible Zuni ring

My Dad bought this ring years ago and left it to me when he passed.
I believe it is Zuni, but I would like to know who the maker was.
I have several Navajo pieces and am able to identify most artists.
Any help would be great. I also need help with any thoughts on what the purple and white material may be.
Thanks :pray:

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Welcome to Turquoise People. Barton Wright’s hallmark book shows to artist that use an LE hallmark, Linda Eustace and Linberg Billah. You might do a google search with those names and see if anything similar shows up.


The purple is probably Sugilite and the white may be shell. Doesn’t look luminous enough to be mother of pearl.

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Doesn’t look like Zuni to me. Stones all look like block.