About Green Amethyst :-Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz, a silicate mineral chemically silicon dioxide. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, but it has also been mined in Lower Silesia in Poland. Naturally occurring prasiolite has also been found in the Thunder Bay area of Canada. As of February 2019, the only mine producing prasiolite is in Brazil but even that is almost mined out. Most prasiolite sold is used in jewellery settings, where it can substitute for far more expensive precious gemstones.