sedimentary
Fossiliferous Limestone
Bioclastic Limestone
AI-generated identification · may be incorrectHardness: 3-4 (Mohs), Color: grey to dark grey with white fossil fragments, Luster: dull to earthy, Crystal structure: microcrystalline matrix with macro-fossil inclusions, Specific gravity: ~2.5-2.7
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Physical properties
Hardness: 3-4 (Mohs), Color: grey to dark grey with white fossil fragments, Luster: dull to earthy, Crystal structure: microcrystalline matrix with macro-fossil inclusions, Specific gravity: ~2.5-2.7
Formation & geological history
Formed in marine environments from the accumulation of calcium carbonate and organic debris (shells, coral, etc.), compacted and cemented over time. Often Paleozoic or Mesozoic in age.
Uses & applications
Used in construction (aggregate, cement production), agriculture (soil conditioning), and as a raw material in various industries.
Geological facts
This specimen contains visible fossil fragments, likely crinoid stems or shell pieces, which appear as white, elongated or circular shapes against the darker grey matrix.
Field identification & locations
Identify by its reaction (fizzing) with dilute hydrochloric acid, mostly grey color, and the presence of visible fossils. Common in many sedimentary basins worldwide.
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