mineral

Green aventurine (probable)

Quartzite dominated by quartz (SiO₂), with green fuchsite mica inclusions

AI-generated identification · may be incorrect

Medium green, opaque to translucent, fine-grained and weakly sparkly; Mohs hardness about 6.5–7, vitreous to slightly greasy luster, no obvious cleavage, and specific gravity near 2.6. The rounded edges suggest tumbling or hand-shaping.

Identified September 11, 2026More mineral →

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Physical properties

Formation & geological history

Usually forms when quartz-rich sandstone or vein material recrystallizes into quartzite, with chromium-bearing fuchsite producing the green color; most commercial material comes from India, Brazil, or Russia. Geological ages vary by deposit, commonly Precambrian to Paleozoic.

Uses & applications

Used for beads, carvings, cabochons, ornamental stone, countertops, and inexpensive lapidary specimens.

Geological facts

Green aventurine is commonly confused with jade, but it is softer and typically shows glittering mica flecks rather than jade’s tougher, waxier appearance.

Field identification & locations

Identify by its green quartz body, subtle aventurescence, glassy fracture, and lack of strong cleavage; a steel knife should generally not scratch it. Confirm with hardness, specific gravity, and microscopic examination because dyed quartzite, serpentine, and jade can look similar.