metamorphic

Green aventurine (likely quartzite)

Quartzite dominated by quartz (SiO₂), with green fuchsite mica or chlorite inclusions

AI-generated identification · may be incorrect

Hardness about 7; pale green, translucent to opaque, with a vitreous to slightly sparkly surface and massive granular texture. No obvious cleavage; specific gravity about 2.6–2.7.

Identified September 6, 2026More metamorphic →

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Physical properties

Hardness about 7; pale green, translucent to opaque, with a vitreous to slightly sparkly surface and massive granular texture. No obvious cleavage; specific gravity about 2.6–2.7.

Formation & geological history

Formed when quartz-rich sandstone recrystallized under heat and pressure, with green mica or chlorite producing the color. Typically Precambrian to Paleozoic, depending on locality.

Uses & applications

Used for carvings, beads, cabochons, ornamental stone, and occasionally countertops or decorative aggregate.

Geological facts

The term “aventurine” properly refers to quartz with reflective mica inclusions; green material may also be sold as jade, though it is not jadeite or nephrite.

Field identification & locations

Common sources include India, Brazil, Russia, Tanzania, and Vermont. Confirm with a steel scratch test only on an inconspicuous edge: true quartzite should resist scratching; strong mica glitter supports aventurine identification.