"Trinity Knot" tapered ring by Keith Jack in sterling silver and 10 karat yellow gold with cubic zirconia (CZ) accents. The Trinity Knot is the most recognized of all Celtic symbols. While there are many different interpretations, most seem to agree on a joining of three (3) entities, three (3) being a sacred number to the Celts. The three (3) life stages: Maiden, Mother, and Wise Woman.