The design is a contemporary interpretation of a traditional Celtic knot. Each piece comes with the option of the following gemstones: peridot, amethyst & blue topaz . Other gemstones available on request. The knotwork is inspired by the decorative illustrations in ancient Celtic manuscripts such as the Book of Kells.The circular pendant comes in 2 sizes. The small is 18mm in diameter and is set with a 4mm gemstone. The larger pendant measures 30mm in diameter and is set with a 6mm gemstone. An 18 inch sterling silver chain comes with each pendant. Each pendant is meticulously crafted in Dublin with love for Irish roots, history and folklore. Each piece is hallmarked in the Assay Office at Dublin Castle.