sedimentary
Crushed Limestone
Calcium Carbonate (CaCO3)
Hardness of 3 on the Mohs scale, typically white, gray, or buff in color, dull to earthy luster, fine-grained to crystalline texture, and exhibits rhombohedral cleavage.
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Physical properties
Hardness of 3 on the Mohs scale, typically white, gray, or buff in color, dull to earthy luster, fine-grained to crystalline texture, and exhibits rhombohedral cleavage.
Formation & geological history
Formed from the accumulation of skeletal fragments of marine organisms such as coral, algae, and mollusks in shallow marine environments over millions of years.
Uses & applications
Extensively used in construction as a base material for roads, driveways, and foundations, as well as in the production of cement, agricultural lime, and concrete.
Geological facts
Limestone formations often preserve remarkable fossils and make up about 10% of the total volume of all sedimentary rocks on Earth.
Field identification & locations
Easily identifiable in the field by its effervescence (fizzing) when exposed to weak hydrochloric acid due to the presence of calcium carbonate.
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