sedimentary

Quartz-rich sandstone

Quartz arenite (tentative; quartz-rich sandstone)

AI-generated identification · may be incorrect

Tan-beige, rough and granular with a dull to slightly vitreous luster; likely mostly quartz, Mohs hardness about 7 for quartz grains. Grain size and cement are difficult to confirm from the image.

Identified October 13, 2026More sedimentary →

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Physical properties

Tan-beige, rough and granular with a dull to slightly vitreous luster; likely mostly quartz, Mohs hardness about 7 for quartz grains. Grain size and cement are difficult to confirm from the image.

Formation & geological history

Formed when sand grains accumulated, compacted, and cemented; its age and depositional setting cannot be determined from appearance alone.

Uses & applications

Sandstone is widely used as building and paving stone and as a source of construction aggregate; this small specimen is mainly suitable for collecting.

Geological facts

Quartz-rich sandstone can be very durable because quartz resists weathering, though durability depends on cement and porosity.

Field identification & locations

Look for visible sand-sized grains and a gritty texture; a scratch test can help distinguish quartz-rich material from softer carbonate rock. Sandstones occur worldwide in sedimentary basins.