sedimentary
Sandstone (likely Quartzite-rich)
Arenite (primarily SiO2)
Hardness: 6-7 on Mohs scale; Color: Tan, beige, or light brown; Luster: Dull to earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 on Mohs scale
- Color
- Tan, beige, or light brown
- Luster
- Dull to earthy
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Tan, beige, or light brown; Luster: Dull to earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in river beds, beaches, or deserts. This specific smooth, water-worn shape suggests a river or coastal origin.
Uses & applications
Used widely as a construction material (dimension stone), in glass manufacturing if silica content is high, and as an abrasive in industrial applications.
Geological facts
Sandstone makes up about 20% of all sedimentary rocks on Earth. Famous structures like Petra in Jordan and the Grand Canyon are primarily composed of various sandstone layers.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible sand grains. Found globally in basins and coastal areas. Commonly used for landscaping and garden paths.
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