Found in a local thrift store but unable to find info on artist

Posting a couple of photos of a pretty cuff I found in a local thrift store. Not sue what kind of turquoise it is but it’s beautiful and nuggety. There is an artist name stamped on the inside of the cuff. I am not able to find much on the web about this artist so I am hoping someone here know who he is to help me date the time period of the cuff. Name is Jimmy Garcia and there is no stamp of sterling or .925 on it to indicate if it’s silver.

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get the metal tested, this one is marked nickel silver