Theses stylish French Blue Chalcedony gemstone cufflinks were specifically designed to accent any tuxedo or dress shirt. Handcrafted with a unique brushed sterling silver X design on the front face, encasing a genuine 10mm French Blue Chalcedony gemstone. The studs are 8mm. The toggle is a bullet style hinge for ease of fastening, wear and security. Each piece is hand-engraved with the LB Designs swirl logo on the backside. One of a kind.