mineral

Tumbled green aventurine (probable)

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

AI-generated identification · may be incorrect

Pale green-gray, translucent to opaque, waxy-to-vitreous luster, massive granular texture, and no obvious cleavage; quartz hardness is about Mohs 7, though fractures and inclusions may make it seem softer.

Identified August 10, 2026More mineral →

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At a glance

Common name: Tumbled green aventurine (probable)
Scientific name: Quartzite dominated by quartz (SiO₂), with green mica/fuchsite or chlorite inclusions
Category: mineral
Identified: August 10, 2026
Method: Standard

AI Estimated Value

About $3–$15 for a common tumbled specimen; approximately $20–$75 if unusually large, attractive, or confirmed as high-quality aventurine.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Likely metamorphosed quartz-rich rock later weathered and naturally or artificially rounded; comparable material forms in Precambrian metamorphic terrains, though the specimen’s exact age and locality cannot be determined visually.

Uses & applications

Used for carvings, cabochons, beads, tumbled stones, ornamental objects, and occasionally architectural stone. This rounded piece is primarily a lapidary or collector specimen.

Geological facts

The green color is commonly caused by fuchsite mica, chlorite, or other inclusions rather than green quartz itself. Its subdued color and coarse fractured texture could also indicate green quartzite or serpentinized rock, so laboratory testing is needed for certainty.

Field identification & locations

Look for quartz-like translucency, hardness sufficient to scratch glass, and green glitter from mica; it should not fizz with dilute acid. Common sources include India, Brazil, Russia, and parts of the United States.