mineral

Tumbled green aventurine

Quartz (SiO₂), commonly with green fuchsite mica inclusions

AI-generated identification · may be incorrect

Hardness 7 Mohs; green, opaque to translucent, with a vitreous-to-waxy polish. Trigonal quartz crystals are too small to see; the rounded shape is from tumbling, not natural cleavage.

Identified October 12, 2026More mineral →

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Physical properties

Hardness 7 Mohs; green, opaque to translucent, with a vitreous-to-waxy polish. Trigonal quartz crystals are too small to see; the rounded shape is from tumbling, not natural cleavage.

Formation & geological history

Quartz-rich material formed in silica-rich veins or metamorphic rocks; green color and subtle sparkle commonly come from mica inclusions. Quartz deposits occur in many geological ages and settings.

Uses & applications

Popular inexpensive tumbled stone for collecting, beadwork, and decorative objects; quartz also has broad industrial uses.

Geological facts

Aventurine is a variety of quartz; its characteristic glitter, when visible, is called aventurescence.

Field identification & locations

Look for a uniform green body color and possible fine mica shimmer; it is commonly sourced from India, Brazil, and Russia. The image supports a tumbled green quartz identification, but cannot confirm the inclusions.