sedimentary
Sandstone
Arenite (SiO2 based)
AI-generated identification · may be incorrectHardness: 6-7 Mohs; Color: Tan, beige, grey; Luster: Dull/Earthy; Crystal Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8.
- Hardness
- 6-7 Mohs
- Color
- Tan, beige, grey
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, beige, grey; Luster: Dull/Earthy; Crystal Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8.
Formation & geological history
Formed by the cementation of sand-sized mineral particles or rock fragments. These are typically deposited in river beds, oceans, or deserts over millions of years. This specimen appears to be a common clastic variety.
Uses & applications
Extensively used in construction, road building, as a primary material for glass manufacturing (if high silica), and as a popular choice for stone carvings and garden features.
Geological facts
Sandstone represents about 20% of all sedimentary rocks on Earth. Famous landmarks like the Grand Canyon or the Treasury at Petra are formed primarily from sandstone layers.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible grain structure. Commonly found in sedimentary basins and coastal areas worldwide. Collectors look for unique color banding or fossil inclusions.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
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Sandstone
Arenite
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Shale
Shale (clastic sedimentary rock)
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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