mineral

Green aventurine (likely)

Quartzite dominated by quartz (SiO₂), with fuchsite mica inclusions

AI-generated identification · may be incorrect

Typically translucent to opaque green, with a waxy to vitreous luster and subtle glitter from mica; hardness about 6.5–7 Mohs, no distinct cleavage, granular quartz crystal structure. The rounded shape appears tumbled or polished.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz-rich rock recrystallizes and incorporates chromium-bearing fuchsite or other green minerals, commonly during metamorphism. Most commercial material comes from India, Brazil, Russia, and Tanzania; exact geological age depends on locality.

Uses & applications

Used for beads, cabochons, carvings, ornaments, and inexpensive jewelry; also sold as a decorative stone and lapidary rough.

Geological facts

Aventurine’s characteristic aventurescence is caused by reflective mineral platelets, though this specimen appears only weakly sparkly. Similar green stones may be jade, serpentine, prehnite, or dyed quartz, which cannot be reliably separated from the image alone.

Field identification & locations

Look for a cool, dense stone with uneven green coloration, quartz-like hardness, and occasional fine internal sparkle; it should scratch glass but not be scratched by a steel knife. Commonly found as rounded tumbled pieces in metaphysical and lapidary collections.