sedimentary
Sandstone Pebble
Sandstone (SiO2 rich clastic rock)
Hardness: 6-7 on Mohs scale; Color: Reddish-brown to tan; Luster: Dull, earthy; Texture: Granular, sand-like grains felt on surface; Structure: Clastic
- Hardness
- 6-7 on Mohs scale
- Color
- Reddish-brown to tan
- Luster
- Dull, earthy
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Reddish-brown to tan; Luster: Dull, earthy; Texture: Granular, sand-like grains felt on surface; Structure: Clastic
Formation & geological history
Formed by the compaction and cementation of mineral particles or rock fragments (predominantly quartz and feldspar) in beach, desert, or river environments, smoothed into a pebble by stream or wave action over time.
Uses & applications
Commonly used as construction aggregate, paving material, land decoration, and for studying sedimentary processes.
Geological facts
Sandstone pebbles often retain grain patterns that reveal ancient environmental conditions such as wind, wave currents, or river flow rates.
Field identification & locations
Identified by its sandy, gritty texture and visible sand grains under magnification. Extremely common along beaches, rivers, and gravel beds worldwide.
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