It's Made in India. Silver, amethyst and "marcasite". The little stones are faceted pyrite (marcasite). When new, the marcasite is really shiny. Yours are oxidized from being in the ground.
Well Brad, when I used to buy that stuff from India ( to resell ) 10+ years ago, a piece like yours cost me around $5. Of course, it was nice and shiny, and I would sell it for around $20. Age on yours is probably 1 to 20 years if I had to guess. It's really impossible to clean up, with the marcasite, so I would scrap it. A couple dollars, maybe. Good luck. The amethyst is pretty, but it is low grade and valueless, unfortunately. You could try buffing it up a bit, and give it away, but those marcasite are usually glued on, and have a tendency to fall off when buffing.