Prasiolite is a green variety of quartz, a silicate mineral chemically silicondioxide.
Since 1950, almost all natural prasiolite has come from a small Brazilian mine, but it has also been mined in Lower Silesia in Poland. Natural prasiolite has also been found in the Thunder Bay area of Canada. [4] As of February 2019 , the only mine producing prasiolite is in Brazil , but even that is nearly mined out .
Most of the prasiolite sold is used in jewelry settings , where it can replace much more expensive gemstones.