mineral
Tumbled green aventurine (likely)
Quartz (SiO₂) with fuchsite or other mica inclusions
AI-generated identification · may be incorrectTranslucent pale green, waxy to vitreous luster, rounded and polished; Mohs hardness about 7, no obvious cleavage, trigonal crystal structure. The soft green color and subtle internal shimmer are consistent with aventurine quartz.
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Physical properties
Translucent pale green, waxy to vitreous luster, rounded and polished; Mohs hardness about 7, no obvious cleavage, trigonal crystal structure. The soft green color and subtle internal shimmer are consistent with aventurine quartz.
Formation & geological history
Forms when quartz-rich fluids or rocks crystallize with chromium-bearing fuchsite mica inclusions, commonly in metamorphic or hydrothermal settings. Its geological age varies by deposit; the pictured piece is human-tumbled and polished.
Uses & applications
Used for inexpensive cabochons, beads, carvings, ornamental objects, and lapidary collections. It is also sold as a decorative “healing crystal,” though such claims are not scientifically established.
Geological facts
Aventurine’s characteristic aventurescence is caused by light reflecting from tiny mica or mineral platelets; this specimen appears only weakly aventurescent.
Field identification & locations
Common sources include India, Brazil, Russia, and Tanzania. Confirm with hardness testing and visible mica sparkle; green glass or dyed quartz may resemble it, so identification from an image is not definitive.
