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is an ammonite pair
these ammonites have been cut open to reveal the internal spiral of the shell
Some specimens will have more than one piece of pyrite in the matrix
The once hollow chambers of the shell of this extinct marine Cephalopod (something akin to a shell–dwelling squid) have been filled with deposits of calcite
The key rings come in 2 styles:
Trilobite Paralejurus gypsum is an ammonite pairParalejurus trilobites. A Moroccan trilobite whose characteristics include a wide pygidium (rear) with a distinctive fan of ridges . Found in the Mrakib, Alnif, Morocco. Devonian,circa 390 million years old. Price includes a small display stand. In its original matrix, minimum size of the trilobite not including the surrounding stone is 6cm x 5cm
