mineral

Tumbled green aventurine (likely)

Quartz (SiO₂) with fuchsite or other mica inclusions

AI-generated identification · may be incorrect

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.

Identified September 14, 2026More mineral →

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Physical properties

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.