igneous and sedimentary mixture
Mixed Crushed Stone
Aggregate (varied mineral composition)
Hardness: 5-7 Mohs; Color: grey, green, brown, and tan; Luster: dull to earthy; Structure: massive/fragmental; Cleavage: poor/variable.
- Hardness
- 5-7 Mohs
- Color
- grey, green, brown, and tan
- Luster
- dull to earthy
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Physical properties
Hardness: 5-7 Mohs; Color: grey, green, brown, and tan; Luster: dull to earthy; Structure: massive/fragmental; Cleavage: poor/variable.
Formation & geological history
Formed through various geological processes including volcanic cooling (basaltic) and lithification of sediments; typically mechanically crushed for construction.
Uses & applications
Used in construction as road base, concrete aggregate, railway ballast, and landscaping gravel.
Geological facts
Crushed stone is one of the most accessible and widely used natural resources in the world; over 1 billion tons are produced annually in the US alone.
Field identification & locations
Identify by angular edges from mechanical crushing and varied mineral colors; commonly found at construction sites, driveways, and quarries.
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