mineral

Tumbled pale green aventurine (probable)

Quartz, SiO₂, with dispersed fuchsite or other green inclusions

AI-generated identification · may be incorrect

Hardness about 7 Mohs; pale blue-green to mint-green color, vitreous-to-waxy luster, granular microcrystalline quartz, and no visible cleavage. The dark spots may be inclusions, pits, or surface staining; exact identification requires testing.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz-rich material formed in hydrothermal veins or metamorphic environments, with green mica or other minerals producing the color; commonly Precambrian to younger, depending on locality.

Uses & applications

Used for tumbled stones, carvings, beads, cabochons, and inexpensive decorative jewelry; not generally used as a major construction stone.

Geological facts

Aventurine’s characteristic shimmer, called aventurescence, comes from reflective inclusions, although this specimen appears mostly opaque and non-sparkly.

Field identification & locations

Commonly found in India, Brazil, Russia, and Tanzania. Confirm by scratch testing only on an inconspicuous area: quartz should scratch glass, while glass should not scratch it; a gemological test is needed to distinguish aventurine from dyed quartz, chalcedony, or jade-like materials.