Pteria penguin Shell Valve with Developing Pearl A fascinating natural valve of Pteria penguin, featuring a prominently developing pearl still attached within the shell. This species—also known as the winged oyster—is prized for its striking nacre, and this specimen beautifully displays iridescent reflections ranging from silver to soft gold and subtle pastel tones. The partially exposed outer surface contrasts with the brilliant mother-of-pearl interior, highlighting the organic process of pearl formation. The developing pearl, measuring 1.5 cm in diameter, stands out clearly and adds significant scientific and aesthetic value. A captivating piece for collectors, educational displays, or anyone fascinated by mollusks and pearl biology. Dimensions: 13.5 × 11 × 2 cm Pearl diameter: 1.5 cm Plastic stand included