sedimentary
Sandstone (Pebble)
Sandstone
AI-generated identification · may be incorrectHardness: 6-7 on Mohs scale; Color: Tan, beige, brown; Luster: Dull, earthy; Grain structure: Granular clastic sedimentary texture consisting mostly of quartz grains; Cleavage: None
- Hardness
- 6-7 on Mohs scale
- Color
- Tan, beige, brown
- Luster
- Dull, earthy
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Tan, beige, brown; Luster: Dull, earthy; Grain structure: Granular clastic sedimentary texture consisting mostly of quartz grains; Cleavage: None
Formation & geological history
Formed by the compaction and cementation of sand-sized mineral particles or rock fragments, typically deposited in river beds, beaches, or deserts over millions of years.
Uses & applications
Commonly used in construction, paving, landscaping, and as aggregate material. Uncut small pebbles are primarily decorative or field samples.
Geological facts
Sandstone consists predominantly of quartz and feldspar, which are among the most common minerals in the Earth's crust. It frequently preserves sedimentary structures like cross-bedding and ripple marks.
Field identification & locations
Identified by its gritty, sand-like texture when scratched or felt. Widely found in sedimentary basins, riverbeds, and deserts around the world.
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