sedimentary
Sandstone (Quartzose)
Sandstone (SiO2 dominated)
Hardness 6-7 on Mohs scale, earthy brown to reddish-tan color, dull to sub-vitreous luster, granular texture made of rounded to sub-angular quartz grains, specific gravity ~2.2-2.8.
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Physical properties
Hardness 6-7 on Mohs scale, earthy brown to reddish-tan color, dull to sub-vitreous luster, granular texture made of rounded to sub-angular quartz grains, specific gravity ~2.2-2.8.
Formation & geological history
Formed from the deposition, compaction, and cementation of sand-sized grains, typically in riverbeds, lakes, deserts, or marine environments over millions of years.
Uses & applications
Commonly used as a building material, paving stone, decorative landscaping stone, and as a source of silica in glass manufacturing.
Geological facts
Sandstone can preserve fossilized tracks and ripple marks from ancient beaches or sand dunes, providing key clues about past geological environments.
Field identification & locations
Identified by its gritty texture (feels like sandpaper when rubbed) and visible sand grains cemented together; widely found in sedimentary basins and canyon walls globally.
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