metamorphic

Weathered quartz-rich rock, likely quartzite or silicified limestone

Quartzite (mostly SiO₂), possibly calcareous quartzite with residual calcite

AI-generated identification · may be incorrect

Off-white to pale tan, massive and granular, with vitreous to dull luster; apparent hardness about 6–7 if quartz-rich, though softer patches may indicate calcite (Mohs 3). No clear crystal faces or cleavage are visible; the surface appears strongly weathered.

Identified September 13, 2026More metamorphic →

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At a glance

Common name: Weathered quartz-rich rock, likely quartzite or silicified limestone
Scientific name: Quartzite (mostly SiO₂), possibly calcareous quartzite with residual calcite
Category: metamorphic
Identified: September 13, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 for a small common specimen; higher prices require distinctive color, texture, locality, or polished presentation.

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 metamorphism or silica replacement of a quartz-bearing sandstone or carbonate rock, generally during regional tectonism; its precise geological age cannot be determined from the image.

Uses & applications

Quartzite is used as crushed stone, aggregate, slabs, and ornamental material; attractive pieces may be collected, but this specimen appears ordinary and unpolished.

Geological facts

The pale, sugary texture and irregular white grains are consistent with quartz-rich material, but image-only identification is uncertain; acid testing and hardness testing would distinguish quartzite from limestone or marble.

Field identification & locations

Common in metamorphic belts worldwide, including the Appalachians, Rocky Mountains, Alps, and Scandinavian shield. Scratch testing with steel and testing for fizz with dilute hydrochloric acid are useful field checks.