TOUS Color Black chain bracelet with 18kt gold plating over silver, ball-shaped details and square cushion-cut faceted onyx. Gemstone size: 11 mm. Size of the details: 2.6 mm. Bracelet length: 17 cm. Slider clasp. It is made of sterling silver with 18 to 23kt gold plating and has a thickness of 3 microns. This quality guarantees the piece will have greater durability.