mineral

Likely weathered quartz-bearing rock fragment

Provisional identification: quartz-rich sandstone or microcrystalline quartz (SiO₂)

AI-generated identification · may be incorrect

Brown-gray, opaque to slightly translucent, with a dull to weakly vitreous luster and granular texture; apparent hardness about 6–7 Mohs, but cleavage and specific gravity cannot be reliably determined from the image.

Identified August 31, 2026More mineral →

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At a glance

Common name: Likely weathered quartz-bearing rock fragment
Scientific name: Provisional identification: quartz-rich sandstone or microcrystalline quartz (SiO₂)
Category: mineral
Identified: August 31, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as an unidentified common specimen; more if laboratory-confirmed as an unusual mineral or attractive lapidary material.

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

Possibly a naturally weathered sedimentary fragment formed from compacted quartz sand, or a silicified rock; age and formation locality cannot be established visually.

Uses & applications

Common material has little industrial or jewelry value, though attractive quartz-rich fragments may be collected or used decoratively; quartz is important in glass, ceramics, electronics, and construction aggregate.

Geological facts

The triangular shape and rough granular surface are consistent with fracture and weathering rather than a recognizable crystal form.

Field identification & locations

Test with a steel knife or glass: scratching glass suggests abundant quartz, while a streak test and fresh broken surface would improve identification. Quartz-rich rocks occur worldwide, especially in sandstone terrains and hydrothermal zones.