Perlmuttschicht

Perlmuttschicht, also known as nacre or mother-of-pearl, is an iridescent organic calcium carbonate material produced by certain mollusks. It forms the smooth, tough inner lining of their shells, acting as a protective layer against irritants and parasites. The characteristic shimmering, rainbow-like effect arises from the way light interacts with the microscopic layers of aragonite crystals and organic proteins that compose the nacre. These layers are incredibly thin and arranged in a brick-like structure, causing light to diffract and reflect, creating the visual phenomenon.

Perlmuttschicht has been valued by humans for millennia, used in jewelry, decorative objects, and inlay work. Its beauty and durability have made it a sought-after material, though its natural origins mean its availability can be limited. The exact color and intensity of the iridescence vary depending on the species of mollusk and environmental factors. While historically sourced from oysters and abalone, advancements in technology have led to the development of synthetic or cultured mother-of-pearl, offering a more sustainable alternative for commercial use. The study of nacre's structure has also inspired material scientists seeking to create stronger and more resilient composite materials.