mineral

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide (SiO2) with inclusions

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale); Color: Pale to mint green; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: Pale to mint green
Luster: Vitreous

Identified May 21, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Pale to mint green; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or as a secondary mineral in metamorphic and igneous rocks. The green color often results from heat-treating amethyst or natural chlorite/fuchsite inclusions in quartz.

Uses & applications

Commonly used in jewelry, lapidary arts, decorative items, and as a popular specimen for crystal healing and mineral collectors.

Geological facts

Natural occurrences of transparent green quartz are extremely rare in nature; most commercial 'Prasiolite' is created by heating amethyst from specific locations like the Montezuma mine in Brazil.

Field identification & locations

Identify by its hardness (scratches glass) and color. Commonly found in Brazil, India, Russia, and the USA. Collectors look for clarity and intensity of the green hue.