Where is Coral found?
Calcium carbonate (biogenic)
Got a photo? Identify rocks instantly with the Rockby app
Open the appCoral occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Coral
Great Barrier Reef, Australia
The world's largest coral reef system, spanning over 2,300 kilometers, showcasing immense diversity of modern corals.
Caribbean Sea
Home to numerous coral reefs, including those off the coasts of Florida, Belize, and various Caribbean islands.
Indo-Pacific Region
Includes the Coral Triangle (Indonesia, Philippines, Malaysia, Papua New Guinea, Solomon Islands, Timor-Leste), a global center of marine biodiversity and coral diversity.
Fossiliferous Limestones
Ancient coral reefs are preserved as fossil limestones in various geological formations worldwide, such as the Devonian reefs of the Michigan Basin (USA) or the Permian reefs of the Guadalupe Mountains (USA).
Collecting tips
- Ethical Sourcing. Never collect live coral. Collection of dead coral from beaches or legally designated areas should be done responsibly and in accordance with local regulations. Many coral species are protected.
- Fossil Hunting. Look for fossil corals in marine sedimentary rock outcrops, particularly limestones, shales, and sandstones that formed in ancient shallow seas. Road cuts, quarries, and riverbeds can expose such formations.
- Identification of Fossils. Fossil corals often retain their characteristic septa, corallites, and colonial growth patterns, which can help distinguish them from other fossilized organisms or inorganic structures.
Quick Check
- Color:
- Variable (white, pink, red, black, etc.)
- Luster:
- Dull to waxy/vitreous (when polished)
- Streak:
- White
Explore Coral
Identify rocks anywhere
Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.