mineral

Tumbled green aventurine

Quartz (SiO₂) with green mica or other mineral inclusions

AI-generated identification · may be incorrect

Likely Mohs hardness 6.5–7; translucent to opaque green with a polished, vitreous-to-waxy luster. Quartz has a trigonal crystal structure and no cleavage; the rounded shape is from tumbling.

Identified October 6, 2026More mineral →

Explore Tumbled green aventurine in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Likely Mohs hardness 6.5–7; translucent to opaque green with a polished, vitreous-to-waxy luster. Quartz has a trigonal crystal structure and no cleavage; the rounded shape is from tumbling.

Formation & geological history

A variety of quartz formed as silica-rich fluids crystallized in veins or cavities, often in metamorphic rocks; its geological age depends on the host deposit.

Uses & applications

Used for beads, cabochons, carvings, and inexpensive decorative objects or collectibles.

Geological facts

Aventurine’s color commonly comes from fuchsite mica inclusions; sparkling aventurescence is possible but not evident here.

Field identification & locations

Green color and occasional glitter distinguish aventurine, though jade and dyed stones can look similar; common sources include India, Brazil, and Russia. The photo alone cannot confirm identification or natural color.