Large Polished Turbo marmoratus (Green Turban) Shell – Antsiranana, Northern Madagascar An impressive specimen of Turbo marmoratus, commonly known as the Green Turban shell, sourced from the coastal waters of Antsiranana in northern Madagascar. Despite the presence of a natural opening on the shell, this remains a particularly large and visually striking example of one of the most iconic marine gastropods. The shell has been carefully polished to reveal its beautiful natural coloration and lustrous surface, highlighting subtle shades of green, cream, brown, and iridescent tones. Its robust form, broad whorls, and substantial size give it a remarkable decorative presence. The smooth polished finish enhances the intricate growth patterns and natural beauty of the shell, making it an attractive display piece for collectors, marine enthusiasts, or cabinet-of-curiosities interiors. Dimensions: 18.5 × 13 × 11.5 cm This specimen is offered without reserve price, presenting an excellent opportunity for collectors to acquire an impressive example of Turbo marmoratus. With its remarkable size, sculptural form and strong visual presence, it is a highly decorative and collectible specimen, particularly appealing for both shell collections and natural history displays. A large and decorative Green Turban shell, combining natural beauty, impressive dimensions, and strong display potential.