sedimentary
Sandstone Pebble
Arenite (SiO2 based)
Hardness: 6-7 (Mohs), Color: Tan to light brown, Luster: Dull/Earthy, Structure: Granular/Clastic, Specific Gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs), Color: Tan to light brown, Luster: Dull/Earthy, Structure: Granular/Clastic, Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in riverbeds or coastal environments. Likely Quaternary age based on surface wear.
Uses & applications
Landscaping, construction aggregate, and educational specimens. Large deposits are used for abrasive grinding or glass making.
Geological facts
Sandstone can be a significant reservoir for groundwater and petroleum because of its porosity and permeability. This specific specimen is river-rounded, showing mechanical weathering.
Field identification & locations
Identified by its gritty feel (like sandpaper) and visible sand grains. Commonly found in riverbeds, beaches, and sedimentary basins worldwide.
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