mineral
Green Quartz (Prasiolite or Aventurine)
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Pale green to yellowish-green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Pale green to yellowish-green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Pale green to yellowish-green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed in igneous and metamorphic rocks through hydrothermal activity or as a byproduct of volcanic cooling. Green color can result from chlorite inclusions or natural irradiation of iron-bearing quartz.
Uses & applications
Commonly used in jewelry as a semi-precious gemstone, in ornamental carvings, and by collectors. Also used in metaphysical or healing crystal practices.
Geological facts
While natural green quartz is rare in nature, it can be created by heat-treating certain types of amethyst. It is often confused with green calcite or fluorite, but its high hardness distinguishes it.
Field identification & locations
Identify by its ability to scratch glass and lack of cleavage planes. Frequently found in Brazil, India, and parts of the United States. Look for the characteristic glassy luster on broken surfaces.
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