sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
Hardness: 6-7 (Mohs scale); Color: Tan, grey, or light brown; Luster: Dull/Earthy; Texture: Granular, feels like sandpaper; Structure: Clastic; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 (Mohs scale)
- Color
- Tan, grey, or light brown
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (Mohs scale); Color: Tan, grey, or light brown; Luster: Dull/Earthy; Texture: Granular, feels like sandpaper; Structure: Clastic; Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments (sand) over millions of years in environments like beaches, deserts, or river deltas.
Uses & applications
Extensively used in construction for paving, walling, and decorative architecture; also used in glass manufacturing if the quartz content is high.
Geological facts
Sandstone can preserve fossilized remains and ripples from ancient water currents or wind patterns, acting as a 'tape recorder' for past environments.
Field identification & locations
Identify in the field by its gritty texture and visible sand-sized grains. It is one of the most common sedimentary rocks found globally, especially in plateau regions and canyons.
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