sedimentary
Sandstone / Quartzite
Sedimentary quartz arenite
Hardness: 6-7 on the Mohs scale; Color: Tan, brown, yellowish-brown; Luster: Dull to vitreous; Crystal structure: Quartz grains cemented together; Cleavage: None (fractures across grains)
- Hardness
- 6-7 on the Mohs scale
- Color
- Tan, brown, yellowish-brown
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on the Mohs scale; Color: Tan, brown, yellowish-brown; Luster: Dull to vitreous; Crystal structure: Quartz grains cemented together; Cleavage: None (fractures across grains)
Formation & geological history
Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz, in marine, desert, or river environments over millions of years.
Uses & applications
Used primarily in construction, as dimension stone, for paving, and in various industrial applications such as glassmaking and filtration.
Geological facts
Sandstone layers often preserve ancient ripple marks, fossilized tracks, and cross-bedding, offering clues to prehistoric environments.
Field identification & locations
Commonly found in sedimentary basins and geological formations worldwide; identifiable by its gritty texture and visible sand-sized grains.
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