Vintage sterling turquoise opal native American navajo style earrings silver

From an estate, I had purchased other similar navajo pieces from, but these are marked on the back of one of them what looks like Hong Kong? I have done research and some that are made exactly like these are native American navajo, so I assume these are just the navajo style but very very nice! Measures 1.75" long and dangles, these have backs, 3 of them, one is a butterfly sterling back the other two are silver backs not sure if they are sterling or not. The other one doesn't have the sterling butterfly back, this is how these came to me. These are beautiful turquoise and fire opal stones! Inlaid style and the fire in the opals is amazing! has some aged patina, can be polished back though. box 31 I sell in my closet and have tons of other brands similar to list such as weiss, Stanley Hagler, Alice caviness, Demario, Navajo, James Avery, miriam haskell, Jomaz, hattie Carnegie, juliana, Lee sands, Barse, native American, Navajo, Fairchild Baldwin, Elizabeth Taylor, stella & dot, coro, vior,Donald stannard, lisner, renoir, Eisenberg, Christian dior,Givenchy, ciner, carolee's, hobe, Ben amun, Tiffany and co, Vendome, Alexis bittar, Judith jack, kjl, vargas, Sherman, Nolan Miller, Elsa peretti sharra Pagano, Jill Fagin, raebird, Jay feinberg, kenneth Jay lane, Germany, talbots, Lilly pulitzer, J. crew, Japan, Hong Kong, Simon ju, Thelma deutsch, Erwin pearl, monet, Napier, Cynthia Daniel, Judith McCann, hollycraft, Joan rivers, Elizabeth Taylor, Anne klein, Oscar de l