Are green amethyst and peridot the same thing?
Nope, they’re two different minerals. Amethyst is a type of quartz. Green amethyst, more correctly called prasiolite, is usually artificially created since real prasiolite is pretty rare. It’s made by applying heat to regular amethyst. Peridot, on the other hand, is a form of olivine. Peridot’s green color is naturally occurring. If you’re interested in reading more, here’s an article about prasiolite, and here’s one that talks about peridot. Hope this helps!