u/Alternative-Main-523

I went to a local flea market last week and bought a $10 jar of random stuff from a woman. When I dumped it out there was a lot of crap in there, but there were a few things that I'm questionable about. This is one piece. There were also a few other gemstone pendants, a dozen loose stones, some earrings (singles, no sets). Can anyone tell me anything about what I'm looking at here? I can't find any stamps on it. I'm a total novice when it comes to jewelry. I'd love to post the others if that would be appropriate?