mineral

Tumbled green aventurine (probable)

Quartz-rich aventurine; SiO₂ with dispersed fuchsite mica or other green inclusions

AI-generated identification · may be incorrect

Green, opaque-to-translucent, glassy/waxy luster with a smoothly polished surface; quartz hardness is about 7 Mohs, though inclusions may reduce durability. The rounded form is human-tumbled, and subtle glitter may appear under strong light.

Identified August 13, 2026More mineral →

Explore Tumbled green aventurine (probable) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms when quartz-rich material crystallizes with green mica inclusions, commonly in metamorphic or hydrothermal environments. The image alone cannot establish a geological age or confirm the exact variety.

Uses & applications

Used for beads, carvings, cabochons, ornamental objects, and inexpensive lapidary material. It is generally valued as a decorative stone rather than a high-value gemstone.

Geological facts

Aventurine’s characteristic “aventurescence” is caused by reflective mineral platelets; green varieties commonly contain fuchsite. Similar-looking stones include serpentine, nephrite, and dyed quartzite.

Field identification & locations

Check for tiny reflective flashes, hardness near quartz, and a cool, dense feel; glass can be scratched by quartz, while softer green stones cannot. Common sources include India, Brazil, Russia, and Tanzania.