Fossilized Cleoniceras Ammonite with Exquisite Sutural...

A polished specimen of Cleoniceras with collection-worthy details — This lot features an exceptional fossil ammonite specimen belonging to the genus Cleoniceras, found in the Lower Cretaceous deposits of Madagascar. The sample has been carefully cut and polished to reveal its fascinating internal structure, highlighting the complex suture lines that characterize these extinct cephalopods. The preservation is remarkable, allowing a detailed study of its morphology. The suture lines, typically ammonitic, here manifest in an intricate dendritic design, finely outlined and of remarkable clarity against the calcitic and aragonitic fillings of the inner chambers. Color variations, ranging from cream white to deep brown-reddish, result from fossilization and secondary mineralization processes, giving the piece aesthetic depth and intrinsic didactic value. The externally polished surface enhances the natural luster of the fossilized shell. Madagascar is known for the quality and integrity of its Cretaceous ammonite fossils, a period when Cleoniceras were particularly widespread and represented agile and versatile predators in ancient seas. The surrounding rock matrix, though partially removed by the polishing, testifies to the sedimentary conditions that allowed such perfect preservation of this marine invertebrate, preserving even the most minute details. Visually, the piece stands out for the stark contrast between the delicate branching sutures and the solidity of the fossilized shell. The harmonious spiral, typical of the logarithmic geometry of ammonites, is visible and well preserved, offering a fascinating visual snapshot of the evolution of natural forms. The polishing has further enhanced the iridescence and surface textures, making every angle a point of interest. The conservation state is excellent, with no significant fractures or invasive restorations. The cutting and polishing work was carried out with workmanship, ensuring structural integrity and highlighting the most valuable features of the fossil. This specimen does not require additional display support and can be admired from multiple angles. For the collector of minerals and fossils, this Cleoniceras represents an opportunity to acquire a reference specimen for studying sutures and Mesozoic paleontology. Its size and the quality of the details make it a museum-quality piece, ideal for enriching specialized collections or serving as a centerpiece in display, clearly standing out from common specimens for its conservation and visual impact.

Estimate:$560.64

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