mineral

Polished green aventurine (likely)

Quartz-rich aventurine; silicon dioxide (SiO₂) with green fuchsite mica or chlorite inclusions

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; translucent to opaque green, vitreous to waxy luster, granular quartz texture, and no prominent cleavage. The rounded shape and glossy surface indicate a polished or tumbled specimen; tiny reflective flecks may produce aventurescence.

Identified August 18, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz-rich fluids crystallize with dispersed chromium-bearing mica or chlorite, commonly in metamorphic or hydrothermal settings. Individual specimens are generally Precambrian to younger, depending on deposit.

Uses & applications

Used for cabochons, beads, carvings, worry stones, and inexpensive ornamental objects; it has limited industrial value compared with ordinary quartz.

Geological facts

Green aventurine is commonly confused with jade, nephrite, amazonite, or dyed quartz. Strong sparkle favors aventurine, while uniform color and glassy appearance can indicate dyed material.

Field identification & locations

Common sources include India, Brazil, Russia, Tanzania, and China. Check for natural granular texture, hardness near quartz, and mica shimmer; avoid identification by color alone.