mineral

Polished green aventurine

Quartzite or quartz-rich rock containing fuchsite mica; mainly SiO₂

AI-generated identification · may be incorrect

Typically medium green with subtle glitter from included mica, though this polished heart appears matte/satin. Quartz hardness is about 7 Mohs, vitreous to waxy luster, granular crystalline texture, no prominent cleavage, and specific gravity around 2.6–2.7.

Identified August 8, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich material recrystallizes into quartzite or when quartz veins crystallize with green fuchsite inclusions, commonly during metamorphic or hydrothermal activity. Precise age depends on locality.

Uses & applications

Used for cabochons, carvings, hearts, beads, decorative stone, and inexpensive jewelry; larger pieces are used ornamentally rather than structurally.

Geological facts

Aventurine’s characteristic shimmer is called aventurescence and is caused by reflective mineral inclusions, especially fuchsite or mica. The pictured specimen is likely shaped and polished.

Field identification & locations

Identify by its green color, fine sparkle, quartz-like hardness, and inability to scratch glass only if sufficiently quartz-rich; distinguish it from dyed quartz or green glass by inspecting inclusions and texture. Common sources include India, Brazil, Russia, and Tanzania.