Collection of 20 Complete Perisphinctes Ammonite Fossils...

Collection of 20 Complete Perisphinctes Ammonite Fossils – Jurassic – Madagascar An attractive collection of 20 complete Perisphinctes ammonite fossils from the Jurassic deposits of Madagascar, presented together in a practical display and storage box. Each ammonite preserves its characteristic tightly coiled spiral and prominent radial ribbing, creating a fascinating variety of natural patterns and textures. Unlike sectioned ammonites, these specimens retain their three-dimensional external shell morphology, allowing the original structure of these prehistoric marine cephalopods to be appreciated. The collection displays a beautiful range of earthy tones, including golden ochre, sandy beige, warm brown, rusty orange, and subtle greyish shades. Natural variations in color, preservation, and mineralization give each fossil its own distinctive appearance. Particularly interesting are the pronounced ribs extending across the whorls, with some specimens displaying remarkably sharp and regular ornamentation, while others retain a more rugged, naturally weathered surface. A few ammonites reveal small natural cavities and exposed mineralized interiors, including an attractive crystalline formation visible within one specimen. These details add further interest to the collection and illustrate the different fossilization processes experienced by the shells. The fossils show natural fractures, surface irregularities, and varying degrees of preservation. A couple of specimens have undergone repairs, consistent with their fossil nature and preparation. The collection is supplied in the display box shown in the photographs, with the ammonites individually arranged for convenient presentation and storage. Largest Specimen: 9 × 8.2 × 2.4 cm Smallest Specimen: 7.2 × 6.3 × 2.1 cm Box Dimensions: 43 × 30.5 × 5 cm Total Weight Including Box: 3,655 g A beautiful and varied collection of Jurassic marine fossils, particularly appealing for paleontology enthusiasts, educational displays, and collectors who appreciate the distinctive sculptural forms of naturally preserved ammonites.

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