fossil
Coral Fossil
Anthozoa (order Scleractinia)
Hardness: 3-4 (Mohs); Color: White, cream, or light tan; Luster: Dull to earthy; Structure: Hexagonal or radiating septa patterns within corallites; Composition: Calcium carbonate (Calcite or Aragonite)
- Hardness
- 3-4 (Mohs)
- Color
- White, cream, or light tan
- Luster
- Dull to earthy
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Physical properties
Hardness: 3-4 (Mohs); Color: White, cream, or light tan; Luster: Dull to earthy; Structure: Hexagonal or radiating septa patterns within corallites; Composition: Calcium carbonate (Calcite or Aragonite)
Formation & geological history
Formed from the mineralized remains of polyp colonies in marine environments. These specimens are often Holocene to Pleistocene in age, found in reef limestone formations.
Uses & applications
Scientific study, aquarium decoration, jewelry (when silicified), and home decor.
Geological facts
Corals are colonial marine organisms. Fossilized specimens often show the intricate plumbing of the polyps, known as septa, which remain preserved after the living tissue decays.
Field identification & locations
Identified by the distinct honeycombed or radial pattern of holes (corallites). Commonly found on beaches near tropical reefs or in ancient limestone quarries.
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