sedimentary

Weathered sandstone or granitic rock fragment

Likely quartz-rich sandstone; exact identification requires testing

AI-generated identification · may be incorrect

Pale gray-beige, granular, dull to slightly sparkly surface with visibly cemented grains; likely hardness about 6–7 for quartz grains, with no obvious cleavage. The porous, gritty texture suggests sandstone rather than a crystalline mineral specimen.

Identified August 9, 2026More sedimentary →

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Physical properties

Formation & geological history

Probably formed from compacted and cemented sand, potentially millions to hundreds of millions of years old, then broken and weathered at the surface. A volcanic or granitic fragment is also possible from the image alone.

Uses & applications

Common sandstone is used for building stone, paving, aggregate, and landscaping; small unattractive fragments generally have negligible commercial or collector value.

Geological facts

Quartz grains commonly make sandstone scratch glass, while carbonate-cemented varieties may fizz weakly with dilute hydrochloric acid. Its rounded, irregular shape appears naturally weathered rather than cut or polished.

Field identification & locations

Likely locations include sedimentary terrains worldwide, especially deserts, river deposits, and exposed sandstone formations. Examine grain size, layering, acid reaction, and whether individual quartz grains are visible; a streak, hardness, and dilute-acid test would improve identification.