Pyrite-Replaced Snail Shell (Gastropod)

Indiana, USA

5x3.5x4.5cm

A striking example of pseudomorphism—this gastropod shell has been completely replaced by brassy pyrite, preserving every delicate detail of the original mollusk. The cubic crystal structure of the iron sulfide creates a lustrous, metallic finish that catches light beautifully, while the spiral geometry of the shell remains perfectly intact. Sourced from Indiana's rich Paleozoic deposits, this specimen showcases the geological processes that transform organic material into mineral form over millions of years. The contrast between the geometric pyrite crystals and the organic curves of the gastropod form makes it a compelling display piece for collectors interested in pseudomorphs, paleontology, or mineral replacement phenomena. Approximately 5 x 3.5 x 4.5 cm. A museum-quality addition to any mineral or fossil collection.