sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
Hardness: 6-7 on the Mohs scale. Color: Typically reddish-brown, tan, brown, yellow, or grey due to iron oxide impurities. Luster: Dull or earthy. Structure: Clastic, composed of cemented mineral particles or rock grains, primarily quartz.
- Hardness
- 6-7 on the Mohs scale
- Luster
- Dull or earthy
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Physical properties
Hardness: 6-7 on the Mohs scale. Color: Typically reddish-brown, tan, brown, yellow, or grey due to iron oxide impurities. Luster: Dull or earthy. Structure: Clastic, composed of cemented mineral particles or rock grains, primarily quartz.
Formation & geological history
Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, mostly quartz and feldspar, typically deposited by water, wind, or ice in environments like deserts, rivers, and beaches.
Uses & applications
Widely used in construction, building facades, paving, decorative stone, and historically for grinding stones and sharpening tools.
Geological facts
Sandstone formations can be thousands of feet thick and often form dramatic landscapes and monuments, such as those found in Zion and Grand Canyon national parks.
Field identification & locations
Can be identified by its gritty texture, visible sand grains, and layered sedimentary structure. Common globally in desert regions and ancient riverbeds.
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