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agate and other minerals over millions of years
This species is thought to be distantly related to modern-day herrings and sardines
thick wood slices are so well preserved that the tree rings and the exterior bark are still clearly visible
circa 50 million years old
Small split ammonite pair Size:standard agate and other minerals overProbably the most decorative fossil we sell, these ammonites have been cut open to reveal the internal spiral of the shell. The once hollow chambers of the shell of this extinct marine Cephalopod (something akin to a shelldwelling squid) have been filled with deposits of calcite, agate and other minerals over millions of years . Cretaceous, Albian, circa 110 million years old. From Mahajunga, Madagascar. is an ammonite pair, you will receive both
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