sedimentary
Gravel / Crushed Stone
Aggregate (mixed mineral rock fragments)
Hardness: 3-7 on Mohs scale depending on constituent minerals; Color: Mixed tones including gray, brown, beige, and black; Luster: Dull to earthy; Texture: Coarse-grained, angular to sub-rounded fragments.
- Hardness
- 3-7 on Mohs scale depending on constituent minerals
- Color
- Mixed tones including gray, brown, beige, and black
- Luster
- Dull to earthy
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Physical properties
Hardness: 3-7 on Mohs scale depending on constituent minerals; Color: Mixed tones including gray, brown, beige, and black; Luster: Dull to earthy; Texture: Coarse-grained, angular to sub-rounded fragments.
Formation & geological history
Formed through mechanical weathering and erosion of pre-existing igneous, metamorphic, or sedimentary rocks, or produced mechanically by crushing larger rocks in quarries.
Uses & applications
Widely used as construction aggregate, road base material, concrete mix component, drainage material, and decorative landscaping gravel.
Geological facts
Gravel is one of the most mined geological resources in the world, critical for global infrastructure and building development.
Field identification & locations
Identified by loose, coarse collection of rock fragments. Commonly found in riverbeds, glacial deposits, beaches, and commercial rock quarries worldwide.
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