sedimentary
Sandstone Pebbles
Arenite
Hardness: 6-7 Mohs; Color: Brown, tan, reddish-grey; Luster: Dull/Earthy; Texture: Granular/Sand-like; Structure: Clastic
- Hardness
- 6-7 Mohs
- Color
- Brown, tan, reddish-grey
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Brown, tan, reddish-grey; Luster: Dull/Earthy; Texture: Granular/Sand-like; Structure: Clastic
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments (detritus) like quartz or feldspar. These specimens have been rounded by water erosion in a river or coastal environment.
Uses & applications
Construction aggregate, decorative landscaping, and occasionally used as a source of silica for glassmaking.
Geological facts
Sandstone makes up about 20-25% of all sedimentary rocks on Earth. The rounded shape indicates significant travel through water, which wears down sharp edges over time.
Field identification & locations
Identify in the field by its 'sandpaper' feel. These can be found in riverbeds, beaches, and desert environments worldwide. Collectors look for unique banding or fossil inclusions.
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