sedimentary
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Hardness: 6-7 (individual grains); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic texture; Cleavage: None; Specific Gravity: 2.2 - 2.8
- Hardness
- 6-7 (individual grains)
- Color
- Tan, beige, or light brown
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (individual grains); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic texture; Cleavage: None; Specific Gravity: 2.2 - 2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized grains of mineral or rock fragments. Typically deposited in riverbeds, deserts, or coastal environments over millions of years.
Uses & applications
Used widely in the construction of buildings, as a paving material, in glass manufacturing, and as a decorative stone in landscaping.
Geological facts
Sandstone is one of the most common types of sedimentary rock and often acts as a natural aquifer, storing large quantities of groundwater or oil due to its porosity.
Field identification & locations
Identify in the field by its 'gritty' feel (like sandpaper) and visible layering. It is commonly found in sedimentary basins and arid regions globally.
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