sedimentary
Sandstone
Arenite
AI-generated identification · may be incorrectHardness: 6-7 on Mohs scale; Color: Tan, beige, or white; Luster: Dull/Earthy; Texture: Granular, feels like sandpaper; Composition: Primarily quartz and feldspar.
- Hardness
- 6-7 on Mohs scale
- Color
- Tan, beige, or white
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Tan, beige, or white; Luster: Dull/Earthy; Texture: Granular, feels like sandpaper; Composition: Primarily quartz and feldspar.
Formation & geological history
Formed through the accumulation and lithification of sand-sized mineral particles or rock fragments in environments such as deserts, beaches, or river deltas. The specimen shown appears to be a clastic sedimentary rock acting as a substrate for insects.
Uses & applications
Widely used as a construction material (building stone), for paving, and in the manufacturing of glass and grindstones.
Geological facts
Sandstone is one of the most common types of sedimentary rock and often contains fossils. It is a major aquifer and petroleum reservoir due to its porosity.
Field identification & locations
Identify in the field by its gritty texture and visible sand grains. Found globally in sedimentary basins. Collectors often look for colorful 'picture' sandstones or specimens with fossil inclusions.
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Sandstone or Siltstone
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Sandstone
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Quartz pebble
Silicon dioxide (SiO2)
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Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
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Shale
Shale (clastic sedimentary rock)
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