mineral

Green aventurine (likely)

Quartz, SiO₂, with green fuchsite or other mica inclusions; identification from the image is uncertain

AI-generated identification · may be incorrect

Rough, pale-green specimen with a matte to slightly sparkly surface. Quartz has Mohs hardness 7, a trigonal crystal structure, vitreous luster when polished, and no cleavage; the visible color and texture alone are not diagnostic.

Identified October 2, 2026More mineral →

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Physical properties

Formation & geological history

Aventurine forms when quartz crystallizes with platy mineral inclusions, commonly fuchsite. Its age and precise formation environment cannot be determined from the photograph.

Uses & applications

Used as a decorative stone, in beads and carvings, and as a collectible; this rough fragment is not suitable for assessing gem quality from the image.

Geological facts

The characteristic glitter of aventurine, called aventurescence, comes from reflective inclusions; it is not clearly visible here.

Field identification & locations

Check for a granular quartz texture and reflective green mica flecks; hardness testing or mineralogical analysis would help confirm it. Green quartz-bearing material occurs in several regions, including India and Brazil.