Where is Prasiolite found?
Green Quartz (SiO2)
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Open the appPrasiolite occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Prasiolite
Montezuma, Minas Gerais, Brazil
A primary source of natural prasiolite, where amethyst is naturally heated by geological processes.
Lower Silesia, Poland
Another known locality for natural prasiolite.
Thunder Bay, Ontario, Canada
Some occurrences of natural green quartz have been reported here.
Arizona, USA
Limited occurrences of natural green quartz have been found.
Collecting tips
- Look for Amethyst Deposits. Natural prasiolite is often found in areas known for amethyst, as it is typically a thermally altered form of amethyst. Search in pegmatites, hydrothermal veins, and volcanic vugs.
- Examine Color Carefully. Distinguish natural prasiolite from heat-treated amethyst. Natural prasiolite often has a more subtle, leek-green color, while heat-treated material can sometimes be a brighter, more intense green. However, visual distinction can be challenging without gemological testing.
- Check for Associated Minerals. Prasiolite may be found alongside other quartz varieties, feldspars, micas, and various hydrothermal minerals.
Quick Check
- Color:
- Pale to medium green
- Luster:
- Vitreous
- Streak:
- White
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