mineral
Green Quartz (Prasiolite)
Silicon Dioxide (SiO2) with trace impurities
AI-generated identification · may be incorrectHardness: 7 (Mohs scale); Color: Light to leek-green; Luster: Vitreous; Crystal Structure: Trigonal (hexagonal prisms); Cleavage: None; Specific Gravity: 2.65
- Hardness
- 7 (Mohs scale)
- Color
- Light to leek-green
- Luster
- Vitreous
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Physical properties
Hardness: 7 (Mohs scale); Color: Light to leek-green; Luster: Vitreous; Crystal Structure: Trigonal (hexagonal prisms); Cleavage: None; Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or as a secondary mineral in volcanic rock cavities. Natural green quartz is rare and usually occurs through heat treatment of amethyst or citrine in the presence of iron ions.
Uses & applications
Primarily used in jewelry (faceting and cabochons) and as a collector's gemstone or healing crystal.
Geological facts
Most green quartz on the market is actually heat-treated amethyst from Brazil or Poland. Natural prasiolite is extremely rare in nature.
Field identification & locations
Identify by its light green transparency and lack of inclusions compared to glass. It can be found in localized areas of Brazil, Arizona, and Poland.
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Sandstone (with potential mineral staining/concretions)
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Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
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Septarian Pebble
Septarian nodule / Concretion
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