sedimentary
Sandstone Pebble
Quartzose Sandstone (Sedimentary Rock)
Hardness: 6-7 on Mohs scale (due to quartz grains); Color: Tan, brown, or reddish; Luster: Dull to earthy; Crystal structure: Clastic/granular texture composed of cemented mineral particles; Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 on Mohs scale (due to quartz grains)
- Color
- Tan, brown, or reddish
- Luster
- Dull to earthy
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Physical properties
Hardness: 6-7 on Mohs scale (due to quartz grains); Color: Tan, brown, or reddish; Luster: Dull to earthy; Crystal structure: Clastic/granular texture composed of cemented mineral particles; Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz, in environments such as deserts, rivers, beaches, or shallow seas over millions of years.
Uses & applications
Used in construction, building materials, glassmaking, and landscaping. Common in landscaping and aggregate.
Geological facts
Sandstone is famous for forming dramatic geological monuments and landforms worldwide, such as Zion National Park and Petra.
Field identification & locations
Can be identified in the field by its gritty texture and visible sand grains. Found worldwide in sedimentary basins.
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