some pieces I don’t know anything about, possibly Navajo? Signed Dino

Can anyone identify the signature? I think it says “Dino”. Also stamped AMP Sterling.
Plus the other oval pendant is stamped 925 India, so opinions on whether it is turquoise? I inherited a large box of jewelry and I’m having a wonderful time sorting and playing in it, but I’m just uneducated about it.
Thank you for any help!






AMP Dine’ © sterling

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