sedimentary

Likely weathered sandstone fragment

Quartz-rich sandstone, predominantly SiO₂ with minor feldspar and iron-oxide cement

AI-generated identification · may be incorrect

Tan-brown, dull to earthy luster, visibly granular and weakly layered; quartz hardness is 7 Mohs, but the porous rock commonly scratches or crumbles more easily. No obvious cleavage; specific gravity typically 2.2–2.7.

Identified August 14, 2026More sedimentary →

Explore Likely weathered sandstone fragment in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed when sand was deposited, compacted, and cemented, commonly in rivers, beaches, dunes, or shallow marine settings; its exact geological age cannot be determined from the image.

Uses & applications

Used as building stone, paving, aggregate, and decorative material; this small weathered fragment has little commercial or collector value.

Geological facts

The brown coloration is likely from iron oxides, while the parallel surface lines may reflect bedding, weathering, or saw-cut abrasion. The specimen could also be a fragment of another brown, fine-grained sedimentary rock, such as siltstone.

Field identification & locations

Look for individual sand grains, gritty texture, pores, and layers; sandstone commonly occurs in sedimentary cliffs, road cuts, streambeds, and quarries. A hand lens, streak test, and acid test help distinguish it from limestone or altered concrete.