sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: Brown, tan, reddish-brown, Luster: Dull/Earthy, Crystal structure: Granular/Clastic, Cleavage: None, Specific gravity: 2.2-2.8

Identified June 9, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: Brown, tan, reddish-brown, Luster: Dull/Earthy, Crystal structure: Granular/Clastic, Cleavage: None, Specific gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation of sand-sized mineral particles or rock fragments. Over millions of years, pressure and minerals like silica or calcium carbonate cement the grains together in river beds, deserts, or marine environments.

Uses & applications

Commonly used in construction as a building material, for paving stones, as a source of glass sand, and in artistic sculptures.

Geological facts

Sandstone accounts for approximately 20 to 25 percent of all sedimentary rocks on Earth and can preserve incredible fossil records and ripples from ancient waterways.

Field identification & locations

Identify in the field by its gritty, sandpaper-like texture and visible layers (bedding). It is found globally in sedimentary basins. Collectors often look for colorful banding (Liesegang rings) or fossils.