Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. Prasiolite,
green-quartz or vermarine is a green form of quartz, a silicate mineral
chemically silicon dioxide. Prasiolite is one of several quartz
varieties. Since 1950, almost all natural prasiolite has come from a
small Brazilian mine, but it is also seen in Lower Silesia in Poland.
Naturally-occurring prasiolite is also found in the Thunder Bay area of
Canada. Prasiolite can also be found spelled praziolite. Prasiolite can
be confused with the similarly colored praseolite which results from the
heat treatment of iolite, a variety of cordierite. It is a rare stone in
nature. Most prasiolite sold is used in jewellery settings. Prasiolite
is heat treated amethyst. Most amethyst will turn yellow or orange when
heated producing citrine. But some amethyst will turn green when
treated.
