Polished Nautilus Shell Half – Iridescent Mother-of-Pearl with Natural Chambers An elegant polished half of a Nautilus shell, beautifully sectioned to reveal its remarkable internal chamber structure, a natural spiral that closely follows the golden ratio and has fascinated scientists, mathematicians, and collectors for centuries. The exterior has been expertly polished, revealing a luminous mother-of-pearl surface with delicate iridescent reflections that shift between soft shades of green, pink, gold, and blue depending on the light. The shell's smooth finish enhances its natural beauty while preserving its organic character. The interior displays a beautifully preserved sequence of chambers, offering a striking view of the Nautilus' unique architecture. As visible in the photographs, a few of the thinner internal chamber walls show small natural losses. Such imperfections are common in sectioned Nautilus shells due to the extreme delicacy of these partitions and do not detract from the specimen's overall beauty or display quality. Whether appreciated as a natural history specimen, an educational example of biological geometry, or an elegant decorative object, this Nautilus shell combines scientific significance with timeless aesthetic appeal. Dimensions: 13.5 × 10.5 × 3.7 cm A refined natural specimen showcasing one of nature's most iconic geometric forms, enhanced by exceptional nacreous iridescence and an elegant polished finish. Attention bidders from outside EU: This lot requires specific cites custom clearance procedures to be shipped outside Italy and then imported in your Country. We strongly discourage bidders from outside the European Union to make offers.