mineral

Green aventurine (likely)

Quartzite dominated by quartz (SiO₂), colored green by fuchsite mica or chlorite

AI-generated identification · may be incorrect

Typically Mohs hardness 6.5–7, translucent to opaque, medium green, with a smooth tumbled surface and vitreous to slightly waxy luster. Quartz has a trigonal crystal structure and indistinct cleavage; the pictured piece shows no visible sparkle, so identification is approximate.

Identified August 7, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz-rich rock recrystallizes during metamorphism and incorporates green mica or chlorite; major material is commonly from India, Brazil, Russia, and Tanzania. The geological age varies by deposit.

Uses & applications

Used for beads, cabochons, carvings, decorative objects, and inexpensive collector specimens; occasionally used as ornamental stone.

Geological facts

Aventurine’s characteristic aventurescence is caused by reflective mica inclusions, producing glitter when rotated under light; this specimen appears relatively non- aventurescent.

Field identification & locations

Identify by its uniform green color, hardness, cool feel, and inability to scratch with a steel nail; test cautiously, as dyed chalcedony, serpentine, and glass can look similar. Common tumbled pieces are widely sold in lapidary markets.