sedimentary
Sandstone Pebble
Arenite (Sandstone)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs scale), Color: tan, beige, and cream with dark brown banding, Luster: dull/earthy, Texture: clastic (sand-sized grains), Structure: visible cross-bedding or laminations
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, beige, and cream with dark brown banding, Luster: dull/earthy, Texture: clastic (sand-sized grains), Structure: visible cross-bedding or laminations
Formation & geological history
Formed by the accumulation and cementation of mineral particles or rock fragments of sand size, often in riverbeds, deserts, or marine environments. The banding suggests rhythmic deposition or mineral staining (Liesegang rings).
Uses & applications
Primarily used in construction and glassmaking on a large scale; small pebbles are used for landscaping, aquarium gravel, or as decorative pocket stones.
Geological facts
Sandstone is one of the most common sedimentary rocks on Earth. The rhythmic lines in this specimen are likely a result of changing water energy or the precipitation of iron oxides within the porous rock.
Field identification & locations
Identify by its 'sandpaper' feel and visible layers. Commonly found in riverbeds, sedimentary basins, and coastal areas worldwide.
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