Rock Identifier
Coral Fossil (Scleractinia (Fossilized Coral)) — fossil
fossil

Coral Fossil

Scleractinia (Fossilized Coral)

AI-generated identification · may be incorrect

Hardness: 3 to 4 on the Mohs scale. Color: Typically white, cream, or yellowish-brown. Luster: Dull to vitreous. Structure: Porous, skeletal aggregate of calcium carbonate.

Hardness
3 to 4 on the Mohs scale
Color
Typically white, cream, or yellowish-brown
Luster
Dull to vitreous
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Physical properties

Hardness: 3 to 4 on the Mohs scale. Color: Typically white, cream, or yellowish-brown. Luster: Dull to vitreous. Structure: Porous, skeletal aggregate of calcium carbonate.

Formation & geological history

Formed from the calcium carbonate skeletons of marine invertebrate polyps (coral) that accumulated over thousands to millions of years in shallow marine environments and underwent fossilization.

Uses & applications

Used in educational collections, decorative displays, and occasionally in jewelry or craft making.

Geological facts

Fossil corals provide crucial clues to ancient marine climates, sea levels, and the evolutionary history of reef ecosystems dating back hundreds of millions of years.

Field identification & locations

Can be identified by its distinctive porous, honeycomb-like cellular structure. Commonly found in sedimentary limestone formations worldwide.

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Fossiliferous limestone (likely a crinoidal or shell-fragment limestone) (Bioclastic limestone, composed chiefly of calcite (CaCO₃)) — sedimentary

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Bioclastic limestone, composed chiefly of calcite (CaCO₃)

sedimentary
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Rounded sedimentary pebble

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