Where is Fossilized Coral found?
Coral (fossilized)
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Open the appFossilized Coral 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 Fossilized Coral
Florida, USA
Known for its 'Agatized Coral' (specifically 'Florida Agatized Coral'), which is the state stone. These fossils are primarily from the Oligocene and Miocene epochs, found in limestone deposits.
Indonesia (especially Sumatra)
Produces a wide variety of beautifully patterned and colored fossilized corals, often from Tertiary period marine deposits.
Morocco
Known for Devonian-age fossilized corals, often found in limestone and shale formations.
Utah, USA
Various locations yield fossilized corals, particularly from Paleozoic marine sediments.
Australia
Diverse occurrences across different states, including Western Australia and Queensland, from various geological periods.
China
Significant deposits of fossilized corals, often from Paleozoic and Mesozoic eras.
Collecting tips
- Research Geological Maps. Consult geological maps of areas known for ancient marine sedimentary rocks, especially those indicating past reef environments or limestone formations. Look for areas with exposed bedrock or eroded sedimentary layers.
- Look for Associated Fossils. Fossilized coral is often found alongside other marine fossils such as brachiopods, crinoids, and mollusks, indicating a marine sedimentary environment.
- Examine Outcrops and Riverbeds. Search in exposed rock outcrops, road cuts, quarries, and riverbeds where erosion has uncovered older sedimentary layers. Weathering can sometimes reveal the patterns more clearly.
- Check for Distinctive Patterns. Look for rock fragments exhibiting the characteristic radial, honeycomb, or star-like patterns of coral polyps. These patterns are often more visible on weathered surfaces or when the rock is wet.
- Test Hardness. Since it's silicified, fossilized coral will be harder than typical limestone (calcite). It should scratch glass and not be easily scratched by a steel knife (Mohs hardness 6.5-7).
Quick Check
- Color:
- Variable (white, gray, brown, black, pink, red, yellow, blue)
- Luster:
- Waxy to vitreous (polished), dull to earthy (unpolished)
- Streak:
- White
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