It is a Blue Mussel Handmade Lampwork Glass beads cufflinks. It has a painstaking craftsmanship and the finest materials. The continuously evolving Daniel Dolce Italy collections 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. It has a Wearable works of art; these cuff links are made in Murano, Italy. Master artisans layer gold leaf into the glass, fuse and shape the links over a flame by hand, then polish them to a high shine. Available in red, blue, white or green; see available styles above bullet-style backs1/2"L due to the nature of the hand-blown glass, each piece is unique and the color may vary. These accessories provide the perfect finishing touch to the current gentleman's fashion attire.