Black Onyx Sterling Silver Tuxedo SINGLE Stud- . carefully inlaid black onyx Hand Crafted 925 Sterling Silver Single (1) Tuxedo Stud Anti-tarnish finish applied for longer lasting wear Stud(10mm width approx.) Available in Black Onyx Fixed Stud back Packaged in black Velour Pouch gifting travel pouch perfect for home storage Also available as cufflinks