mineral

Tumbled green aventurine quartz

Aventurine quartz, silicon dioxide (SiO₂) with dispersed fuchsite or other mica inclusions

AI-generated identification · may be incorrect

Typically Mohs 6.5–7; rounded and polished, olive- to gray-green, with a fine granular texture and subtle aventurescence (sparkly reflection). Quartz is trigonal, has vitreous luster, and lacks cleavage; the pictured piece appears opaque to translucent.

Identified August 19, 2026More mineral →

Explore Tumbled green aventurine quartz 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 veins or metamorphic rocks crystallize with chromium-bearing fuchsite mica; most material is Precambrian to younger metamorphic rock, commonly sourced from India, Brazil, and Russia.

Uses & applications

Used for beads, cabochons, carvings, ornamental stone, countertops, and decorative objects; common tumbled pieces have modest jewelry value.

Geological facts

Aventurine’s glitter comes from aligned reflective inclusions, not from the quartz itself; green color is commonly caused by fuchsite, while iron-bearing inclusions can produce reddish or brown varieties.

Field identification & locations

Identify by its green color, quartz-like hardness, rounded polish, and faint glitter that shifts with light; it should scratch glass but not be scratched by a steel knife. Common localities include India, Brazil, Russia, and Tanzania.