Sphaerechinus granularis – Large Sea Urchin Test with Beautiful Natural Patterns – 13.4 cm An impressive large specimen of Sphaerechinus granularis, distinguished by its beautifully rounded shape, remarkable pentaradial symmetry and delicate natural coloration. This elegant sea urchin test displays a harmonious combination of ivory-white, cream, soft beige and warm brown tones, arranged in alternating radial bands that emphasize its characteristic five-part symmetry. The subtle color variations create an attractive geometric pattern across the entire surface. One of the most fascinating features of this specimen is its exceptionally detailed texture. The surface is covered with hundreds of prominent, rounded white tubercles, arranged in regular rows and contrasting beautifully with the darker underlying areas. These structures, which originally supported the sea urchin's spines, create an intricate three-dimensional pattern that becomes particularly impressive when viewed up close. The specimen retains a full, strongly domed profile, with a beautifully preserved rounded silhouette. Viewed from above, the five radial sections converge toward the central apical area, while the underside reveals a large natural opening surrounded by the continuation of the characteristic tubercular pattern. Its generous dimensions and delicate coloration make this specimen particularly attractive, combining scientific interest with a refined decorative quality. Minor natural irregularities and small imperfections may be present, consistent with the delicate structure of an authentic sea urchin test and visible in the photographs. A beautiful marine natural history specimen, ideal for echinoderm collectors, Wunderkammer displays or sophisticated interiors inspired by the natural world. Dimensions: 13.4 × 13.4 × 10.5 cm