sedimentary

Quartz-rich sandstone or quartzite fragment

Likely quartz arenite; possibly weakly metamorphosed quartzite (mostly SiO₂)

AI-generated identification · may be incorrect

Pale pinkish-beige, granular and rough, with a dull to subtly sparkly luster; likely Mohs hardness 6–7. Quartz grains are visible, but cementation and cleavage are absent; exact identification needs a fresh surface and acid test.

Identified August 11, 2026More sedimentary →

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Physical properties

Formation & geological history

If sandstone, it formed by burial and cementation of quartz sand, commonly during the Paleozoic–Mesozoic; if quartzite, later heat and pressure recrystallized the sandstone. The image alone cannot establish geological age.

Uses & applications

Common sandstone is used for building stone, paving, and aggregate; quartzite is used for durable countertops, road aggregate, and decorative stone. This small fragment has little commercial value.

Geological facts

The apparent pale pink color may come from iron-oxide staining or feldspar impurities. Quartz-rich rocks are highly resistant to weathering and commonly survive as rounded or angular gravel.

Field identification & locations

Look for sand-sized grains and scratching by steel or glass; sandstone may fizz weakly only if carbonate cement is present, while quartzite does not. Common worldwide, especially in sedimentary basins and metamorphic mountain belts.