This Trinity knot necklace is crafted in sterling silver and is embellished with marcasite. Marcasite is a light crystal with a bright metallic finish that adds a unique metallic sparkle. The Trinity knot is one of the most recognizable symbols of Celtic culture. It is known as a variation of Celtic Knot which represents the Holy Trinity. With no beginning and no end, the Trinity Knot represents eternal life and never-ending love. It has been Irish hallmarked by the Assay office at Dublin Castle and comes on a 18 inch sterling silver rolo chain.