mineral

Tumbled green aventurine (likely)

Quartz variety, SiO₂, containing fuchsite or other green inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; pale to medium green, translucent to opaque, with a smooth tumbled surface and vitreous-to-waxy luster. Quartz has a trigonal crystal structure and no cleavage; the image is insufficient to confirm exact identity.

Identified August 25, 2026More mineral →

Explore Tumbled green aventurine (likely) 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 silica-rich fluids crystallize quartz with dispersed green mica or other inclusions, commonly in metamorphic or hydrothermal settings. Geological ages vary by deposit, generally millions to billions of years.

Uses & applications

Used for beads, cabochons, carvings, worry stones, and ornamental objects; attractive specimens have modest collecting value.

Geological facts

Aventurine’s characteristic glitter, called aventurescence, comes from reflective inclusions—typically fuchsite mica in green material. Similar-looking green chalcedony, jade, serpentine, or dyed quartz are possible.

Field identification & locations

Common sources include India, Brazil, Russia, and Tanzania. Check for natural inclusions, quartz-like hardness, and faint sparkle; glass may show round bubbles, while jade and serpentine are typically tougher or softer, respectively.