mineral

Green aventurine (tumbled)

Quartz-rich aventurine; predominantly microcrystalline SiO₂ with fuchsite mica inclusions

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; translucent pale to medium green, vitreous-to-waxy luster, and no obvious cleavage. Green color typically comes from chromium-bearing fuchsite; specific gravity about 2.6–2.7.

Identified September 5, 2026More mineral →

Explore Green aventurine (tumbled) 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 crystallizes with disseminated mica during metamorphism, commonly in altered igneous or metamorphic rocks. Most commercial material comes from India, Brazil, Russia, and Zimbabwe; precise ages vary by deposit.

Uses & applications

Used for beads, carvings, cabochons, ornamental stone, and inexpensive tumbled specimens; occasionally used as decorative aggregate.

Geological facts

Aventurine is a variety of quartzite or massive quartz distinguished by aventurescence—sparkling reflections from inclusions—though this specimen appears relatively fine-grained and subdued.

Field identification & locations

Identify it by its green color, glassy translucency, quartz-like hardness, and possible mica sparkle; it should scratch glass but not be scratched by a steel knife. Similar green glass or dyed quartz may show bubbles, uniform color, or weaker hardness.