sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Hardness: 6-7 (Mohs scale); Color: tan, grey, buff; Luster: dull/earthy; Crystal structure: clastic texture with visible sand-sized grains; Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale)
Color: tan, grey, buff
Luster: dull/earthy

Identified July 5, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: tan, grey, buff; Luster: dull/earthy; Crystal structure: clastic texture with visible sand-sized grains; Specific Gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in river beds, deserts, or marine environments over millions of years.

Uses & applications

Used primarily as a construction material (dimension stone), in glass making (if high silica content), and as decorative landscaping stones.

Geological facts

Sandstone accounts for about 20% of all sedimentary rocks on Earth. It is a major reservoir rock for petroleum and natural gas due to its high porosity.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper) and visible layers or bedding planes. Common worldwide, especially in arid regions like the American Southwest.