sedimentary
Red Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Hardness varies from 6 to 7 depending on quartz content. Color is reddish-brown due to iron oxide (hematite or goethite) cement. Luster is dull to earthy. Composed primarily of sand-sized mineral grains or rock fragments, mostly quartz and feldspar.
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Physical properties
Hardness varies from 6 to 7 depending on quartz content. Color is reddish-brown due to iron oxide (hematite or goethite) cement. Luster is dull to earthy. Composed primarily of sand-sized mineral grains or rock fragments, mostly quartz and feldspar.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, typically in desert or river environments over millions of years.
Uses & applications
Commonly used in construction, building facades, paving stones, and landscaping materials.
Geological facts
The red color comes from iron oxide acting as a natural cement coating the sand grains. Many famous historical monuments and ancient buildings are constructed from red sandstone.
Field identification & locations
Easily identified by its granular texture, visible sand grains, and characteristic reddish-brown coloration. Found worldwide in sedimentary basins and geological formations.
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