Green cats eye gold statement ring

I believe this is green apatite bc of the cats eye appearance. It does test in the glass area of gem tester, but the gem tester does not test for apatite that I know of I would have to research. Stick with glass catseye .I have had to do quite a bit of research bc I thought this was some type of element. It does have a sizer in it. It can start at a 6.5 push down too a size 8 max on mandrel. The stone is cut very nicely. Im just taking my best guess on what it is and it’s prob gold plated over a copper or brass. I didn’t see stamps unless I missed them. It has a texture to the gold overlay on band. It’s a beautiful costume piece.when you move it, moves like a type of cats eye.. in the light and out of the light and I did not have great lighting taking photos. So around a size 6.5-8 max approx since it has the lil sizer thing in it. Please view the photos so you can see as it’s reference to this piece. I always state used good condition. Even if it hasn’t been used, I’m not sure. I haven’t tried to polish bc I don’t want to damage it, it’s a very nice ring. Offers are welcome. Ty.