mineral

Green aventurine cabochon

Quartzite dominated by quartz (SiO₂), colored green by fuchsite mica or chlorite

AI-generated identification · may be incorrect

Typically medium-green with subtle glitter, opaque to translucent, vitreous to pearly luster, Mohs hardness about 6.5–7, granular quartz crystal structure, and no prominent cleavage. The polished oval is a human-shaped geological specimen.

Identified September 8, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz-rich rock recrystallizes and incorporates chromium-bearing fuchsite or chlorite, commonly during metamorphism; specimens are generally Precambrian to Paleozoic in age depending on locality. Major sources include India, Brazil, Russia, and Tanzania.

Uses & applications

Used for cabochons, beads, carvings, and inexpensive ornamental stone; also sold as a decorative lapidary material and “prosperity” stone.

Geological facts

Aventurine’s characteristic sparkle, called aventurescence, comes from reflective mica platelets; the image appears relatively fine-grained and may also be dyed or another green quartzite imitation.

Field identification & locations

Identify by its granular quartz texture, green body color, and mica sparkle; glass imitations are more uniform and often contain round bubbles. Check hardness and inspect under magnification for flaky fuchsite inclusions.