Vintage 60's ring sarah Coventry FLATTERY marbled green glass gemstone silver

Adjustable will fit from about a 6 up to a 10. 6 7 8 9 10. I am unsure if this is glass or natural gemstone research says both, my opinion is a type of gemstone from the look and feel. it's in amazing condition silver is great no wear. Signed inside, see my other sarah Coventry rings, I have several listed and other estate pieces. box 23 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, 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, Jay feinberg, kenneth Jay lane, Germany, Japan, Hong Kong, Simon ju, Thelma deutsch, Erwin pearl, monet, Napier, Cynthia Daniel, Judith McCann, hollycraft, Joan rivers, Elizabeth Taylor, Anne klein, Oscar de la Renta, Moschino, roule and co, julia Vaughn, jose and maria, les Bernard, Heidi daus, silpada, Sorrell, and more, so keep a look out I list daily