F875 Sample ID F875 • Cabinet O Platyceras Ventricosa 6.5cm W x 4cm H x 1.5cm D • 50g Sample TypeFossilFossil TypeAltered hard partsMohs Hardness 4 DomainEukaryotaKingdomAnimaliaPhylumMolluscaClassGastropoda OrderPlatyceratidaFamilyPlatyceratidaeGenusPlatycerasSpeciesventricosum Distribution/Period, Habitat PreservationOriginal Material Present Orig. Material?Yes ReliefLow to Moderate Mineral Comp.Calcite This fossil is a curved, cap‑shaped gastropod typical of Platyceras ventricosum, showing a broad, swollen body whorl and a flared aperture. The shell preserves its three‑dimensional form with moderate relief, and subtle growth lines remain visible despite weathering. Its calcite composition indicates original shell material is still present. Platyceras species lived in Paleozoic shallow marine environments. Description of Mohs scale here