sedimentary
Sandstone (likely Ferruginous)
Arenite with Iron Oxide cement
Hardness: 6-7 (individual grains); Color: tan, yellow, brown, orange; Luster: matte/earthy; Grain size: 0.06mm to 2mm; Texture: clastic/gritty like sandpaper
- Hardness
- 6-7 (individual grains)
- Color
- tan, yellow, brown, orange
- Luster
- matte/earthy
Identified More sedimentary →
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Physical properties
Hardness: 6-7 (individual grains); Color: tan, yellow, brown, orange; Luster: matte/earthy; Grain size: 0.06mm to 2mm; Texture: clastic/gritty like sandpaper
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral particles or rock fragments, typically in river beds, deserts, or coastal environments. Often contains high amounts of iron oxide (hematite/limonite) providing the yellowish-brown hue.
Uses & applications
Commonly used as a building material, paving stones, and for ornamental landscaping due to its durability and color variety.
Geological facts
Sandstone makes up about 10 to 20 percent of the sedimentary rocks on Earth. It serves as an important aquifer for groundwater and can act as a reservoir for oil and natural gas.
Field identification & locations
Identify in the field by its gritty 'sandpaper' feel and visible layering (bedding). It will not fizz with acid unless it has carbonate cement. Found globally in ancient sedimentary basins.
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