sedimentary
Sandstone pebble
Sandstone (SiO2 with iron oxides)
Hardness: 6-7 on Mohs scale. Color: Brownish-tan to reddish-brown. Luster: Earthy to dull. Texture: Fine to medium sand grain size with rough, weathered surface.
- Hardness
- 6-7 on Mohs scale
- Color
- Brownish-tan to reddish-brown
- Luster
- Earthy to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Brownish-tan to reddish-brown. Luster: Earthy to dull. Texture: Fine to medium sand grain size with rough, weathered surface.
Formation & geological history
Formed by the compaction and cementation of mineral particles or rock fragments, usually composed of quartz and feldspar, typically deposited in river beds, deserts, or marine environments.
Uses & applications
Used in construction, landscaping, road building, and as a common decorative natural stone pebble.
Geological facts
Sandstone comprises about 20% of all sedimentary rocks on Earth. Its color is strongly influenced by the presence of iron oxides.
Field identification & locations
Identified by its grainy, sand-like feel when rubbed and uniform earthy coloration. Found widespread in stream beds, beaches, and sedimentary rock formations globally.
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