mineral
Green aventurine (likely)
Quartzite dominated by quartz (SiO₂), colored green by fuchsite mica or chlorite
AI-generated identification · may be incorrectTypically 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 More mineral →
Explore Green aventurine (likely) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
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.
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.
