It is an Onyx and sterling silver. It comes with painstaking craftsmanship and the finest materials...The continuously evolving Daniel Dolce Italy collection of cufflinks are 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 Antique Open Gaze Onyx and sterling silver Cufflinks unique accessories will provide the perfect finishing touch to the modern gentleman's fashion ensemble. It can be customized according to the order given by the client.