Nacre

Nacre, also known as mother-of-pearl, is the iridescent material lining the shells of some mollusks.

Part of speech: noun
Definition: Nacre, widely recognized as mother-of-pearl, is a natural, iridescent substance found inside the shells of certain mollusks, such as pearls and abalones. This material is composed of calcium carbonate and a protein known as conchiolin, which are layered to create a strong and resilient yet beautiful lining. The iridescence and luster of nacre have made it a highly valued material in the jewelry industry for centuries, used in the crafting of unique pieces such as earrings, pendants, and inlays. Beyond its aesthetic appeal, nacre's durability makes it suitable for both decorative and functional items. The creation process of nacre, which involves the mollusk secreting layers to protect itself from irritants, also plays a crucial role in the formation of pearls, making nacre an integral part of some of the most treasured gems in the world.