Rock Identifier
Fossilized Coral (Cnidaria (replacement by silicon dioxide or calcium carbonate)) — fossil
fossil

Fossilized Coral

Cnidaria (replacement by silicon dioxide or calcium carbonate)

AI-generated identification · may be incorrect

Hardness of 3 to 7 depending on mineral replacement, color ranges from white and tan to grey, dull to vitreous luster, amorphous to microcrystalline structure.

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Physical properties

Hardness of 3 to 7 depending on mineral replacement, color ranges from white and tan to grey, dull to vitreous luster, amorphous to microcrystalline structure.

Formation & geological history

Formed through the petrifaction of ancient coral reefs where original skeletal material is replaced by minerals over millions of years.

Uses & applications

Used in lapidary arts, wire-wrapped jewelry, decorative carvings, and fossil collections.

Geological facts

Fossil coral often preserves intricate details of ancient marine ecosystems dating back hundreds of millions of years.

Field identification & locations

Identified by distinctive cellular or honeycomb patterns left by coral polyps; found globally in ancient sedimentary marine deposits.

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