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Prasiolite Jewelry - Hover over an item for more information
no photoRoss-Simons 11.50 Carat Green Amethyst Ring With Diamonds in 14kt White Gold
no photoRoss-Simons 9-9.5mm Cultured Baroque Pearl, 43.50ct t.w. Multi-Stone Necklace. 36"
no photoRoss-Simons 17.00ct t.w. Multi-Stone Station Bracelet in Silver. 7.5"
no photoSterling Silver Peridot, Green Amethyst Hook Earrings Jewelry
no photoRoss-Simons 16.20 ct. t.w. Multi-Stone Bracelet in 14kt Yellow Gold
no photoRoss-Simons 4.55ct t.w. Multi-Stone Circle Earrings in 18kt Yellow Gold Over
no photoRoss-Simons 6.80 ct. t.w. Green Amethyst Rope Twist Earrings in 14kt Yellow Gold
no photoRoss-Simons 2.65ct Green Amethyst, .10ct t.w. Diamond Pendant Necklace in Gold
no photoSterling Silver Green Amethyst Hook Earrings Jewelry
no photoRoss-Simons 14.50ct t.w. Italian Green Amethyst, .48ct t.w. Diamond Bracelet. 7.5"
no photoRoss-Simons 7.50ct Green Amethyst Ring, White Topaz Accents in Silver
no photoRoss-Simons 8.75 Carat Green Amethyst Ring in Sterling Silver
no photo6.09 carat Pear Cut Green Genuine Amethyst Genuine PerI.D.ot Accent Sterling Silver Ring, Size 10,6,7,8,9, Size 10,6,7,8,9
no photoGreen Amethyst Delphinium Ring - Stephen Dweck
Neiman Marcus
no photoRoss-Simons 6.80 ct. t.w. Oval Green Amethyst Drop Earrings in 14kt Yellow Gold


PRASIOLITE, the green variety of quartz
(also known as Green Amethyst)


  • VARIETY OF: Quartz , SiO 2 .
  • USES: Gemstone and ornamental stone.
  • COLOR: a pale lime-green
  • INDEX OF REFRACTION: 1.544-1.553
  • CLEAVAGE: none
  • CRYSTAL SYSTEM: trigonal
  • For natural prasiolite mineral specimens see our For Sale or Sold lists

Prasiolite (or vermarine) is the name for any quartz crystal or cluster that is green in color. Although often cut as a gemstone, prasiolite is actually quite rare in nature.

Most prasiolites on the market are heat treated amethyst. These stones are sometimes called "Green Amethyst", possibly because amethyst is the starting variety, or possibly just because it sounds more valuable that way. When heat treated, the amethyst from most locations transforms into yellow or orange citrine. From a few locations, a green color results. These locations include Montezuma, Brazil, and Arizona. Naturally occurring prasiolite has been reported from Poland.

Prasiolite (sometimes spelled praziolite) can be confused with the similarly colored praseolite which results from the heat treatment of iolite, a variety of cordierite. Note the spellings: prasiolite is the quartz variety, while praseolite is the cordierite variety - not the other way around (which would be easier to remember).

Note that prasiolite is macro-crystalline quartz. A green cryptocrystalline quartz, where the individual crystals are too small to be seen and the resulting transparency is translucent, would be called chrysoprase. The term prase is sometimes used for any leek-green color of quartz, whether macro- or cryptocrystalline.

Some colorless quartz crystals have sufficient inclusions of chlorite to result in a green color. However, this would not be considered prasiolite. In any event, the color is wrong - more of a dark grass-green than a leek-green. Note that green ghost crystals inside a clear quartz crystal is almost certainly a chlorite coating over an earlier quartz crystal, and not an example of quartz over prasiolite.

Prasiolite is only one of several quartz varieties. Other varieties that form macroscopic (large enough to see) crystals are as follows: