mineral

Green aventurine quartz (likely)

Quartz, SiO₂, colored mainly by fuchsite mica or chlorite inclusions

AI-generated identification · may be incorrect

Green, opaque to translucent, with mottled pale inclusions and a vitreous-to-waxy luster; hardness about 7 Mohs, no obvious cleavage, and conchoidal fracture. The rough, rounded shape suggests a tumbled or naturally weathered specimen.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz-rich silica crystallizes with green fuchsite mica or chlorite, commonly in metamorphic and hydrothermal environments. Its age varies with the host rock, often Paleozoic to Precambrian.

Uses & applications

Used for beads, cabochons, carvings, ornamental objects, and inexpensive polished specimens; it has minor decorative-stone value rather than major gemstone value.

Geological facts

Aventurine’s characteristic color comes from mineral inclusions, not the quartz itself; glittering aventurescence is strongest when abundant reflective mica is present.

Field identification & locations

Commonly found in India, Brazil, Russia, Tanzania, and China. Identify it by hardness, green color, quartz-like fracture, and—if present—sparkling mica; avoid confusing it with dyed glass or softer green serpentinite.