Deakin & Francis Cufflinks Sterling Silver Oval Handcut Onyx Inlay C0166X0004. Onyx is a semi precious stone which was very popular with the Ancient Greeks and Romans. A beautiful piece of onyx set jewellery can be both classic and contemporary, the perfect accessory for black and white tie events. These elegant, sterling silver oval cufflinks have a deep hand cut onyx inlay giving this classic pair of cufflinks a contemporary twist.