![Study on the effect of heat treatment on amethyst color and the cause of coloration | Scientific Reports Study on the effect of heat treatment on amethyst color and the cause of coloration | Scientific Reports](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-020-71786-1/MediaObjects/41598_2020_71786_Fig1_HTML.jpg)
Study on the effect of heat treatment on amethyst color and the cause of coloration | Scientific Reports
![Fluorite or amethyst? Bought at a small shop, years ago, labeled fluorite, but other people say it's an amethyst. Educated opinions? : r/whatsthisrock Fluorite or amethyst? Bought at a small shop, years ago, labeled fluorite, but other people say it's an amethyst. Educated opinions? : r/whatsthisrock](https://preview.redd.it/xf208rojjvp71.jpg?auto=webp&s=9ee2b7f030cac26d1f7abcf7d61fafd75a46cf39)
Fluorite or amethyst? Bought at a small shop, years ago, labeled fluorite, but other people say it's an amethyst. Educated opinions? : r/whatsthisrock
![Can't tell difference between purple fluorite and amethyst. Also, please give me some tips on how to tell the difference. : r/whatsthisrock Can't tell difference between purple fluorite and amethyst. Also, please give me some tips on how to tell the difference. : r/whatsthisrock](https://i.redd.it/axpnn4wtdg951.jpg)