Mother-of-pearl, also known as nacre, is an iridescent organic substance produced by mollusks, most notably oysters and abalone. It has been used for centuries in decorative arts and jewelry due to its beautiful sheen and natural patterns. Its use in fashion accessories like buckles and clasps became particularly popular during the Victorian era, adding a touch of elegance and luxury to garments.

Sash clips and buckles made from mother-of-pearl were often used to fasten sashes, belts, or shawls, serving both a functional and decorative purpose. These pieces were frequently crafted with intricate designs, reflecting the prevailing fashion trends of their time. Their delicate beauty and the natural variations in the material make each piece unique and highly sought after by collectors. 1243