The Yellow Gold Plated Silver Black Agate Ring by Tezapsidis Jewellery. Woman\'s ring, totally handmade with black agate and two sapphires mounted on sterling silver and then yellow gold plated. Unique design, a ring that combines Ancient Greek style and contemporary jewellery. About The Designer: Petros Tezapsidis is a fourth-generation Greek jewellery designer and trained gemmologist. Petros is renowned for high-end and contemporary pieces featuring precious gemstones set into 18kt gold and sterling silver. To find out more about the designer please visit Tezapsidis Jewellery.