mineral

Green aventurine (likely)

Quartzite dominated by quartz (SiO₂), colored by fuchsite mica or other chromium-bearing inclusions

AI-generated identification · may be incorrect

A polished/tumbled, opaque-to-translucent green stone with vitreous to slightly waxy luster; quartz hardness is about Mohs 7, with no obvious cleavage and granular quartz structure. The smooth rounded shape indicates human tumbling and polishing.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Usually forms when quartz-rich rock recrystallizes and incorporates green mica or chromium minerals, commonly in metamorphic environments. Geological ages vary by deposit; major material comes from India, Brazil, Russia, and Tanzania.

Uses & applications

Used for beads, cabochons, carvings, decorative objects, and inexpensive jewelry; occasionally sold as a lapidary or metaphysical stone.

Geological facts

Aventurine’s characteristic shimmering effect, called aventurescence, comes from reflective mineral inclusions, though this small specimen appears relatively uniform and may also be green quartzite or dyed material.

Field identification & locations

Identify it by its green color, quartz-like hardness, rounded grains, and possible glitter under angled light; glass imitation is usually softer and shows bubbles. Common rough and tumbled pieces are widely available from India and Brazil.