metamorphic

Green Quartzite / Aventurine

Quartzite (SiO2 with fuchsite/chlorite inclusions)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Pale light green to sea-foam green; Luster: Waxy to dull or vitreous when polished; Crystal structure: Trigonal (microcrystalline aggregate); Cleavage: None; Specific gravity: ~2.65

Hardness: 7 on Mohs scale
Color: Pale light green to sea-foam green
Luster: Waxy to dull or vitreous when polished

Identified July 24, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed via regional metamorphism of quartz-rich sandstone containing chromium-bearing mica (fuchsite) or chlorite, which imparts the distinctive greenish tint.

Uses & applications

Used for lapidary work, decorative carvings, cabochons for jewelry, landscaping, and ornamental stones.

Geological facts

Green quartzite is often mistaken for jade due to its color and smooth river-worn texture, but it is significantly harder and composed primarily of quartz.

Field identification & locations

Can be identified by its inability to be scratched by a steel knife (Mohs 7), its fine granular quartz texture, and soft pale green color. Common in alluvial gravels and metamorphic zones globally.