sedimentary

Sandstone (Quartzite-rich Pebble)

Arenite (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Cream, tan, or off-white; Luster: Dull to grainy; Crystal structure: Clastic (composed of cemented sand grains); Cleavage: None; Specific gravity: Approx 2.65.

Hardness: 6-7 on Mohs scale
Color: Cream, tan, or off-white
Luster: Dull to grainy

Identified June 8, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Cream, tan, or off-white; Luster: Dull to grainy; Crystal structure: Clastic (composed of cemented sand grains); Cleavage: None; Specific gravity: Approx 2.65.

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains, mostly quartz. This specific rounded specimen has been weathered and smoothed by water action in a river or coastal environment.

Uses & applications

Used primarily as construction aggregate, in glass manufacturing if high purity, or as decorative garden stone.

Geological facts

Sandstone accounts for about 10-20% of all sedimentary rocks on Earth. Over time, under intense heat and pressure, this rock can metamorphose into quartzite.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper) and its ability to scratch glass if identifying quartz grains. Commonly found in riverbeds, beaches, and desert outcrops.