Where to Find Calcified Coral in the United States

3 mapped calcified coral spots across 1 U.S. states. Calcified Coral is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.

Map showing where to find calcified coral across the United States, with 3 mapped spots

Top states for calcified coral

States ranked by number of calcified coral spots in our database. States in bold link to a focused calcified coral-in-state list.

Every calcified coral spot we track

Sorted by state and county. Coordinates open in Google Maps.

SpotCountyMineralsCoordinatesAccess
CoralvilleLL Pelling RoadJohnson County
  • Silicified Coral
  • Calcified Coral
41.6883, -91.6242Public
Cedar Rapids29th Ave Dr SWLinn County
  • Silicified Coral
  • Calcified Coral
41.9419, -91.6512Public
Cedar Creek335th StreetMahaska County
  • Silicified Coral
  • Calcified Coral
41.1678, -92.4599Public

Calcified Coral rockhounding FAQ

Where is the best place to find calcified coral in the U.S.?+
Iowa have the highest concentrations of calcified coral in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many calcified coral rockhounding spots does RockHoundR track?+
3 mapped spots across 1 states. The app keeps these on a map alongside your private finds.
Can I legally collect calcified coral on public land?+
Casual hand collecting of common rocks and minerals like calcified coral is allowed on most BLM and U.S. Forest Service land, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always check with the managing agency before a trip.
How do I identify calcified coral in the field?+
Field identification of calcified coral comes down to color, hardness, fracture, and luster. The RockHoundR app links to geology details for each spot to help narrow down what you might be picking up.

Hunt calcified coral on the map

Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.

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