11.2" Cut & Polished Perisphinctes Ammonite - Madagascar

This is a stunning, 11.2" wide cut and polished, Perisphinctes sp. ammonite collected near Sakaraha, Madagascar. Most of the cut and polished ammonites that you see from Madagascar are Cretaceous in age, so these large Jurassic ones are much more unusual.

The previously hollow chambers of the ammonite were replaced with a beautiful agate during the fossilization process. Some of these chambers are still partially hollow and lines with druzy crystals. The ammonite was cut in half and polished revealing the inner chamber structure of this ancient, marine animal. Both halves are included and they come with a pair of display stands.

As with most large ammonites there is some repair work and restoration to the outer surface (non display) side of the ammonite.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.
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DETAILS
SPECIES
Perisphinctes sp.
LOCATION
Near Sakaraha, Madagascar
SIZE
11.2" wide (each half)
ITEM
#31818
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