mineral

Green aventurine quartz (probable)

Quartz, SiO₂, with fuchsite or other green mica inclusions

AI-generated identification · may be incorrect

Translucent to opaque green, with a sparkly mica-like aventurescence and vitreous luster; hardness about 7 Mohs, trigonal crystal structure, no cleavage, and conchoidal fracture. The rough, granular texture is consistent with quartzite or massive quartz containing green inclusions.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz-rich rock recrystallizes or veins crystallize with chromium-bearing fuchsite mica; commonly associated with metamorphic rocks, generally formed during older mountain-building events. Exact age cannot be determined from an image.

Uses & applications

Used for cabochons, beads, carvings, tumbled stones, ornaments, and decorative slabs; also collected as an attractive quartz variety.

Geological facts

Aventurine’s glitter is caused by reflective mineral inclusions, not by the quartz itself. Green color commonly comes from fuchsite mica, though chlorite or chromium-bearing minerals may occur.

Field identification & locations

Look for green color, glassy fracture, hardness sufficient to scratch ordinary glass, and visible glitter when rotated in light. Common sources include India, Brazil, Russia, Tanzania, and Zimbabwe; visually similar green glass is usually more uniform and lacks natural granular fracture.