Prasiolite

Quartz

7Hardness (Mohs)

SiO₂Chemistry

2Known origins & mines

Rare green quartz ("green amethyst"). Natural prasiolite occurs almost exclusively at one Polish locality (Szklary) and Brazil's Montezuma mines, where amethyst heated in basalt turns pale mint-green.

Known origins & mines

Montezuma Prasiolite · Brazil

Active mining · Notable deposit

Montezuma amethyst heated within basalt turns mint-green naturally — Brazil supplies nearly all trade prasiolite ("green amethyst") today.…

Szklary Nickel Mines · Poland

Historic mine · Minor occurrence

One of Earth's only natural prasiolite sources — green quartz found in nickel-silicate weathering zones of Silesian serpentinite quarries.…

Mineral family: Quartz

Amethyst Citrine Ametrine Rose Quartz Smoky Quartz Rutilated Quartz