sedimentary

Sandstone Flagstone

Quartz Arenite Sandstone

Hardness: 6-7 on Mohs scale; Color: Tan, beige, brown, grey, and rust tones; Luster: Dull to earthy; Texture: Granular, sand-like grit; Cleavage: None (splits along bedding planes).

Hardness: 6-7 on Mohs scale
Color: Tan, beige, brown, grey, and rust tones
Luster: Dull to earthy

Identified July 24, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, brown, grey, and rust tones; Luster: Dull to earthy; Texture: Granular, sand-like grit; Cleavage: None (splits along bedding planes).

Formation & geological history

Formed by the compaction and cementation of sand-sized grains, primarily quartz and feldspar, deposited in desert, river, or coastal environment over millions of years.

Uses & applications

Widely used in construction, outdoor paving, patio tiles, flagstone walkways, wall cladding, and architectural stone features.

Geological facts

Sandstone flagstones are selected for outdoor surfaces due to their natural non-slip texture created by individual quartz grains, as well as their resistance to weathering.

Field identification & locations

Identified by its sandy, gritty feel and visible bedding planes where the stone naturally cleaves into flat pavers. Commonly quarried in mountain ranges and sedimentary basin formations worldwide.