fossil

Coral Fossil

Scleractinia (Fossilized Coral)

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

Identified July 31, 2026More fossil →

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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.