sedimentary
Sandstone (with Moss/Lichen Growth)
Sandstone (Quartz Arenite / Lithic Arenite)
Hardness: 6-7 on Mohs scale (quartz grains). Color: Yellowish-brown, tan, orange-rust (iron oxide staining) with greenish dark moss coating. Luster: Dull, earthy. Structure: Granular, clastic texture.
- Hardness
- 6-7 on Mohs scale (quartz grains)
- Luster
- Dull, earthy
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Physical properties
Hardness: 6-7 on Mohs scale (quartz grains). Color: Yellowish-brown, tan, orange-rust (iron oxide staining) with greenish dark moss coating. Luster: Dull, earthy. Structure: Granular, clastic texture.
Formation & geological history
Formed by the accumulation, compaction, and cementation of sand-sized grains (mostly quartz and feldspar) in desert, river, or coastal environments. The specimen shows natural weathering and organic growth on concrete aggregate pavement.
Uses & applications
Commonly used as a building material, paving stone, and in landscaping. Highly variable based on durability.
Geological facts
Sandstone makes up about 10-20% of Earth's sedimentary rocks. Its porosity often makes it an important aquifer for groundwater or a reservoir for oil and natural gas.
Field identification & locations
Identified by its distinctive grainy, sandpaper-like feel and visible layered sand particles. Found widely across riverbeds, cliffs, deserts, and quarries worldwide.
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