Prasiolite
From Wikipedia, the free encyclopedia
Prasiolite, green-quartz or vermarine is a green form of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, but it is seen in Lower Silesia in Poland. The gem has a refractive index of 1.54-1.553. [1] It is usually produced artificially by heat-treating amethyst.
The terms green amethyst and greened amethyst are considered misnomers by gemologists.
[edit] References
[edit] External links
- http://www.gemhut.com/prasio.htm
- http://www.mindat.org/min-6703.html
- http://www.heavenandearthjewelry.com/articles/prasiolite.html
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