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  • Profile picture of Phillip Kaess

    Phillip Kaess posted a new specimen in the group Group logo of What is it?What is it? from the myFOSSIL app 4 months ago

    4 months ago
    4 months ago

    Phillip Kaess has contributed specimen mFeM 157440 to myFOSSIL!

    • Profile picture of A Trilobite
      A Trilobite replied 4 months ago

      I know what you mean, but horn coral fossils are made of calcium carbonate, which is grey. I’m not sure what this material is, maybe iron, but if it is a fossil of something it’s not a horn coral.