mineral

Green Quartz (Prasiolite or Aventurine)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

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

Identified July 5, 2026More mineral →

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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.