Prasiolite, also known as vermarine or praziolite, is a transparent green quartz. Quite rare in nature, most prasiolites on the market are heat treated amethysts, which is why they are sometimes called "green amethysts". Not all heated amethysts result in green hued prasiolites, however. Only amethysts from a few select locations, including Montezuma, Brazil and Arizona, will produce prasiolites when heat treated. Naturally occurring prasiolite has been reported in Poland.
Prasiolite is considered by some to be a true collector's gemstone due to its rarity. Relatively inexpensive, its popularity has grown in recent years with large, clean, color saturated stones as the most valuable and desirable. The color of prasiolite can vary from light yellow-green to deep green, and can look similar to peridot and tourmaline. Ranking 7.0 on the Mohs Hardness Scale, prasiolite is ideal for everyday wear. Clean the stone with warm soapy water and a soft brush while keeping it away from household chemicals. Prolonged exposure to extreme heat or sunlight may cause damage and discoloration. Store your jewelry in a fabric lined box and away from other items and gemstones to avoid scratching.
Derived from the Greek words, "prason" meaning leek, and "lithos" meaning stone, prasiolite was named for its vegetable colored stone appearance. Some believe prasiolite bridges the gap between physical and spiritual aspects of life and attracts prosperity by strengthening the mind and emotions.