sedimentary
Red Sandstone
Quartz Arenite (iron-stained)
Hardness 6-7 (Mohs), reddish-brown color due to hematite/iron oxide, dull to earthy luster, clastic sedimentary texture, composed mainly of sand-sized quartz grains.
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Physical properties
Hardness 6-7 (Mohs), reddish-brown color due to hematite/iron oxide, dull to earthy luster, clastic sedimentary texture, composed mainly of sand-sized quartz grains.
Formation & geological history
Formed through the accumulation, compaction, and cementation of sand-sized grains, typically in desert, river, or coastal environments rich in iron oxides.
Uses & applications
Widely used as a construction material, flagstone, paving, decorative landscaping stone, and architectural facing.
Geological facts
The distinct red color comes from tiny amounts of iron oxide (hematite) coating the quartz grains, often indicating deposition in arid, oxygen-rich terrestrial environments.
Field identification & locations
Identified by its sandy, gritty texture and distinctive reddish-brown color. Common in sedimentary basins, ancient desert formations, and riverbeds worldwide.
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