mineral

Quartz-rich stone, possibly aventurine quartz or quartzite

Quartz (SiO₂), likely massive or microcrystalline; exact identification requires testing

AI-generated identification · may be incorrect

Pale greenish-gray to cream, vitreous-to-waxy luster, uneven fracture, and no obvious cleavage; quartz hardness is Mohs 7 and specific gravity about 2.65. The green color may reflect chlorite, fuchsite, or other inclusions, while rusty areas suggest iron oxides.

Identified September 15, 2026More mineral →

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At a glance

Common name: Quartz-rich stone, possibly aventurine quartz or quartzite
Scientific name: Quartz (SiO₂), likely massive or microcrystalline; exact identification requires testing
Category: mineral
Identified: September 15, 2026
Method: Standard

AI Estimated Value

About $1–$15 as a common rough specimen; attractive, confirmed aventurine or gem-quality material may sell for $10–$50.

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 formed by silica-rich fluids or metamorphism of quartz-bearing rock; age and precise geological setting cannot be determined from the image. It may represent quartzite, massive quartz, or altered quartz-bearing material.

Uses & applications

Quartz and quartzite are used for glass, silica, abrasives, countertops, aggregate, and ornamental stone; attractive green specimens may be collected or used in lapidary work.

Geological facts

The specimen appears natural and unpolished, with translucent edges and granular internal texture consistent with quartz-rich material.

Field identification & locations

Look for glassy luster, lack of cleavage, translucency, and inability to scratch it with a steel knife; quartz should scratch glass. Common sources include Brazil, India, Madagascar, and the United States.