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 Ruby celtic knot combines these concepts with the spiritual attributes of the Ruby . Ruby is known as the gem of courage. Wearing a ruby pendant can help you get through the trials and tribulations of life. Garnets have ancient connections with feminine life force. A garnet pendant worn close to the heart is said to promote balance and peace of mind.