sedimentary or igneous fragment
Gravel or Crushed Stone
Fragmented Aggregate Stone
Hardness: variable (3-7 Mohs); Color: gray, tan, white mix; Luster: dull to earthy; Texture: angular to sub-rounded; Cleavage: none.
- Hardness
- variable (3-7 Mohs)
- Color
- gray, tan, white mix
- Luster
- dull to earthy
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Physical properties
Hardness: variable (3-7 Mohs); Color: gray, tan, white mix; Luster: dull to earthy; Texture: angular to sub-rounded; Cleavage: none.
Formation & geological history
Formed through the mechanical weathering of larger rock formations or industrial crushing. They can be of any geological age depending on the parent rock source.
Uses & applications
Primary use in construction for road base, concrete mixing, drainage systems, and as driveway filler.
Geological facts
Gravel is one of the most mined materials in the world. It provides the literal foundation for modern infrastructure including highways and buildings.
Field identification & locations
Identified by its small size, angular shape (if crushed), and mixed mineral composition. Found globally in riverbeds or quarry outlets.
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