sedimentary
Sandstone Pebbles
Arenite
Hardness: 6-7 (Mohs scale); Color: tan, brown, or buff; Luster: dull; Texture: gritty/clastic; Composition: primarily quartz and feldspar grains.
- Hardness
- 6-7 (Mohs scale)
- Color
- tan, brown, or buff
- Luster
- dull
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Physical properties
Hardness: 6-7 (Mohs scale); Color: tan, brown, or buff; Luster: dull; Texture: gritty/clastic; Composition: primarily quartz and feldspar grains.
Formation & geological history
Formed from the lithification of sand grains deposited by water or wind. This specific specimen appears to be a river-tumbled pebble, having been smoothed by water erosion.
Uses & applications
Used widely in construction (aggregate), landscaping, and glass manufacturing if pure quartz. This small specimen is a common landscape/river stone.
Geological facts
Sandstone can preserve fossil footprints and ripple marks from ancient environments. It is a major reservoir rock for petroleum and groundwater.
Field identification & locations
Identify by its 'sandpaper' feel and visible small grains. Commonly found in riverbeds, beaches, and sedimentary basins worldwide.
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