mineral
Tumbled green aventurine
Quartz (SiO₂) with green mica or other inclusions
AI-generated identification · may be incorrectOpaque to translucent pale green, smooth tumbled surface, vitreous to slightly waxy luster; Mohs hardness 6.5–7, trigonal crystal structure, no prominent cleavage. The photograph alone cannot confirm the exact stone; green serpentine or another material may look similar.
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Physical properties
Opaque to translucent pale green, smooth tumbled surface, vitreous to slightly waxy luster; Mohs hardness 6.5–7, trigonal crystal structure, no prominent cleavage. The photograph alone cannot confirm the exact stone; green serpentine or another material may look similar.
Formation & geological history
A quartz variety formed when silica-rich fluids crystallize in fractures, with green color commonly associated with fuchsite mica. Quartz deposits form across many geological ages and settings.
Uses & applications
Used for beads, cabochons, ornaments, and inexpensive lapidary specimens; limited industrial use as decorative stone.
Geological facts
Aventurine’s characteristic sparkle, called aventurescence, comes from reflective mineral inclusions; it may be subtle or absent in pale specimens.
Field identification & locations
Often sold as tumbled aventurine; confirm identity with hardness, specific gravity, and examination of inclusions. Common sources include India, Brazil, and Russia.
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