About Specifications Complete your outfit with our Black Onyx bracelet. Handcrafted in The Netherlands by professional artisans with the best Nature has to offer and finished with 925 Sterling Silver. - Gems: Black Onyx & Silver - Stone size: 13mm - Metal: 925 Sterling silver - Cord: High-end durable silicone - Packaging: Comes with a luxurious box (Due to the unique characteristics of natural stone, the size and color of the beads can vary slightly.)