sedimentary
Sandstone
Arenite (SiO2 based)
Hardness: 6-7 on Mohs scale; Color: Reddish-brown/Tan; Luster: Dull/Earthy; Texture: Granular/Sand-like; Porous and abrasive.
- Hardness
- 6-7 on Mohs scale
- Color
- Reddish-brown/Tan
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Reddish-brown/Tan; Luster: Dull/Earthy; Texture: Granular/Sand-like; Porous and abrasive.
Formation & geological history
Formed via the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in desert, river, or coastal environments. This specimen shows iron-oxide staining common in terrestrial deposits.
Uses & applications
Widely used as a construction material, for architectural cladding, fireplace surrounds, paving stones, and grindstones.
Geological facts
Sandstone represents about 20% of all sedimentary rocks on Earth. It often preserves fossils and ripple marks from ancient environments.
Field identification & locations
Check for a gritty, sandpaper-like feel when rubbed. Found in massive outcrops and canyons globally, especially in US Southwest and Northern England.
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Sandstone
Arenite (primarily SiO2)
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Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
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