11.6" Honey-Orange Ammonite (Argonauticeras) - Befandriana, Madagascar

This is not one of your typical Madagascar ammonites, it is a rare Argonauticeras from Befandriana in Northern Madagascar. The chambers are filled with a gorgeous, honey/orange colored agate. It's been sliced in half and polished to reveal the inner chamber detail.

About four years ago I was able to acquire three of gorgeous ammonites of this genus and had not seen them on the market since. The story is the area these ones are collected in is very remote and dangerous and the person who had been digging them passed away. I was able to acquire several large pairs of these recently, but I expect they will sell very quickly and who knows if we will ever be able to get anymore.

Comes with a pair of display stands.

Each half of the ammonite differs in size slightly, with one half measuring 11.6" wide, while the other is 11.4" wide.

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
Argonauticeras sp.
LOCATION
Befandriana, Northern Madagascar
SIZE
11.6" wide
ITEM
#113119
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