It is a Fiber Optic and Mother of Pearl. It comes with painstaking craftsmanship and the finest materials. The endlessly evolving Daniel Dolce Italy collection of cufflinks is created from handmade glass, semiprecious and vintage stones, and sterling silver. This line also includes collar stays and pins, tie bars, and formal sets. These Blue Square Screen Fiber Optic and Mother of Pearl Cufflinks accessories will provide the ideal finishing touch to the modern gentleman's fashion ensemble.