mineral
Tumbled green aventurine (likely)
Quartz, SiO₂, with green fuchsite inclusions
AI-generated identification · may be incorrectTypically Mohs 6.5–7, pale to medium green, vitreous to slightly waxy luster, and granular quartz structure; the rounded, polished surface obscures cleavage. The image alone cannot confirm the identification; similar green stones include jade and serpentine.
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Physical properties
Typically Mohs 6.5–7, pale to medium green, vitreous to slightly waxy luster, and granular quartz structure; the rounded, polished surface obscures cleavage. The image alone cannot confirm the identification; similar green stones include jade and serpentine.
Formation & geological history
A quartz variety colored by tiny chromium-bearing mica inclusions, formed in silica-rich veins or metamorphic rocks; its age depends on the source deposit.
Uses & applications
Commonly sold as a tumbled collecting stone, bead, or inexpensive jewelry material; quartz is also widely used in glass and electronics.
Geological facts
Aventurine’s subtle glitter, called aventurescence, comes from reflective mineral inclusions, though it may be faint or absent in pale pieces.
Field identification & locations
Look for a glassy-to-waxy polish, fine sparkle, and hardness sufficient to scratch glass; jadeite, nephrite, and serpentine require additional tests. Green aventurine occurs in places including India, Brazil, and Russia.
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