The celtic knot is an ancient symbol of the journey of life. With no beginning and no end, the knot represents the timeless nature of our spirits and the world we live in. A Emerald celtic knot combines these concepts with the spiritual attributes of the Emerald . Emerald is associated with Venus, the Greek goddess of love and beauty. They say an emerald pendant can protect lovers from unfaithfulness. Ruby is known as the gem of courage. Wearing a ruby pendant can help you get through the trials and tribulations of life.