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Found this on open heath land close to RAF Honington, Suffolk, UK. Its about the size/shape of a cherry tomatoe cut in half.

Thanks

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Yes it could be a fossil. Btw. it is called a sand dollar. The term sand dollar refers to several species of flattened burrowing sea urchins that belong to the order Clypeasteroidea. Sand dollars, sometimes called sea biscuits or sea cucumbers, are closely related to sea urchins, sea cucumbers and starfish.

They are found under the mud and sand in waters virtually everywhere in the world in temperate zones. Sand dollars first appeared about 60 million years ago, at the beginning of the Paleocene era.

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Source: https://www.gomeravive.com/de/wissen/meer-wissen/die-schoenen-und-die-biester/stachelhaeuter/

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    $\begingroup$ Mightn't also be a sea urchin? $\endgroup$
    – Spencer
    Jul 30, 2022 at 23:15
  • $\begingroup$ Yes it could be, however the location tells me it is more likly a sand Dollar $\endgroup$
    – Weiss
    Jul 31, 2022 at 8:14

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