Ammonite, approx. 6" diameter, cleoniceras or similar, Cretaceous, Madagascar. Extinct marine species, related to current nautilus.
This sliced and polished ammonite has a darker color indicating iron/manganese replacement.
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May 8-9 we have a sales booth at Quartz Fest, Canandaigua, NY. Web orders may be delayed and inventory may not be accurate online during this time. Thanks fo your patience! Hope to see you at the show!