sedimentary

Sandstone (with minor quartz and possible clay components)

Clastic Sedimentary Rock (SiO2 dominated)

AI-generated identification · may be incorrect

Hardness: 6-7 (on Mohs scale for individual quartz grains); Color: Buff, tan, and light brown; Luster: Dull or earthy; Crystal structure: Granular with visible sand grains; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 (on Mohs scale for individual quartz grains)
Color: Buff, tan, and light brown
Luster: Dull or earthy

Identified February 17, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed by the accumulation and cementation of sand-sized mineral grains or rock fragments. Typically deposited in desert, river, or coastal environments over millions of years through lithification.

Uses & applications

Commonly used as a building material, in the manufacture of glass (if high silica content), and for road-base or construction aggregate.

Geological facts

Sandstone is one of the most common sedimentary rocks on Earth. It often acts as a natural aquifer, holding groundwater or petroleum due to its porosity.

Field identification & locations

Identified in the field by its gritty, abrasive texture (like sandpaper) and visible layering or bedding. Common in arid canyons and coastal cliffs worldwide.