Montezuma Prasiolite is a dazzling, soft green variety of quartz.

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A green variety of quartz, Montezuma Prasiolite is known for its distinct green color. Prasiolite can range from a yellow-green to green. Deeper hues are preferred and are often considered more desirable.

It's very rare to find prasiolite that occurs in nature. The majority of material available on the market today is the result of treated stones. Montezuma Prasiolite is heat-treated. Typically, specimens of amethyst are used to produce this gem. Most heated amethyst becomes citrine. Very rarely, the heated stone turns into this delightful green gem.

Larger sized crystals are preferred for treatment. These bigger stones produce a finished gemstone with a more desirable, deeper green. Translucent, these gems are faceted into trendy modern cuts or traditionally calibrated sizes. The finished stones can be sensitive to heat, and should be stored out of direct light. Avoid exposing these precious jewels to sources of heat.



• The word 'prasiolite' comes from Greek roots. It translates as "leek-colored stone."

• Occasionally, prasiolite may be identified as 'green amethyst.' This isn't widely accepted, as amethyst is the purple variety of quartz.

• To produce this gorgeous gem it's necessary to heat amethyst to temperatures of over 900 degrees Fahrenheit.

• Prasiolite may also be known as vermarine.

• This gem is often confused with another green gem. Praseolite is a green variety of iolite.

Disclaimer: Use of any stone or mineral is not a substitute for professional medical care or treatment, and nothing herein constitutes medical advice, diagnosis, or treatment. Information provided should not be used to treat any illness, injury, medical condition, or ailment without prior consultation with a qualified health professional.



Location: Brazil

Montezuma Prasiolite is sourced directly from Minas Gerais, Brazil. The Montezuma deposit is renowned for the quartz crystals they produce. They are one of only a few locations worldwide that produce amethyst suitable for heat-treatment to create prasiolite. Due to the complicated process and limited supply, this gemstone is not commonly seen on the market.



  • Ranks 7 on the Mohs scale.
  • Color ranges from yellow-green to green.
  • Sourced from the Montezuma deposit of Minas Gerais, Brazil.
  • Heat-treated for color. Avoid keeping this gem in direct sunlight or near heat sources.