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Nacre
/ˈneɪkər/noun
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Nacre is the iridescent, pearly inner layer of certain mollusk shells, made from stacked layers of aragonite crystals that produce a shimmering, rainbow-like effect. This durable material, commonly known as mother-of-pearl, is not only a natural defense mechanism for shells but has been adapted in modern design for its strength and aesthetic appeal in everything from jewelry to high-tech composites.
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Nacre is so resilient that it can withstand forces up to 3,000 times greater than the individual crystals it's composed of, making it a marvel in biomimicry; scientists have used its structure to develop stronger bulletproof materials, like those in modern body armor inspired by abalone shells.
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