mineral

Prasiolite

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: Pale light green to leek-green; Luster: Vitreous; Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.65

Hardness: 7 (Mohs scale)
Color: Pale light green to leek-green
Luster: Vitreous

Identified April 26, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Pale light green to leek-green; Luster: Vitreous; Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.65

Formation & geological history

Formed through the heat treatment (natural or artificial) of amethyst or citrine in igneous or metamorphic host rocks. Natural prasiolite is extremely rare and usually occurs through geothermal heating near volcanic activity.

Uses & applications

Primarily used in jewelry as a gemstone (rings, necklaces, earrings) and for crystal collecting. It is popular as a more affordable alternative to green precious stones like emerald or peridot.

Geological facts

Also known as 'Green Amethyst' or 'Vermarine'. Most prasiolite on the market is actually purple amethyst that has been heat-treated to 500 degrees Celsius to turn it green.

Field identification & locations

Identify by its characteristic sea-foam green color and clarity. Natural source locations include Brazil, Namibia, Poland, and Canada. In the field, look for hexagonal crystal structures typical of quartz.