mineral

Green aventurine (probable)

Quartz variety, SiO₂, colored by fuchsite or other mica inclusions

AI-generated identification · may be incorrect

Pale green, translucent-to-opaque, vitreous-to-waxy luster with a granular texture; Mohs hardness about 6.5–7, no distinct cleavage, and quartz’s trigonal crystal structure. The rounded shape indicates tumbling or natural abrasion.

Identified September 2, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz-rich fluids crystallize with chromium-bearing fuchsite mica, commonly in metamorphic rocks; most commercial material comes from India, Brazil, Russia, and Tanzania. Exact age depends on locality, generally Precambrian to younger.

Uses & applications

Used for beads, carvings, cabochons, ornaments, and inexpensive healing-crystal specimens; larger pieces may be decorative stone. It is not generally used as a major construction aggregate.

Geological facts

Aventurine’s characteristic sparkle, called aventurescence, comes from reflective mineral inclusions, though this specimen appears only weakly sparkly. Similar pale-green material may instead be serpentine, prehnite, or chrysoprase.

Field identification & locations

Check for tiny reflective flashes, quartz-like hardness, and lack of strong cleavage; it should scratch glass but not be scratched by a steel knife. Commonly found as rounded pebbles or polished/tumbled stones.