12.52 grams. Each onyx set cufflink face measures 1" by 9/16" (26mm x15mm). They are clearly signed by the maker and marked "925" for solid sterling silver on the underside of the cufflink faces. from jewellers estate- sold as is....Make offer! The photos form part of the description. Like all colored stones there is a color variation that occurs in different lighting conditions both inside but also outside, even the time of day can make the color of a stone appear a little different. We do our best to show colors as we see them. Color perception is highly individual and some people can perceive more colors than others, also colors can appear somewhat different on different screens and devices due to variations in screen hardware and device display settings.