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 Onyx celtic knot combines these concepts with the spiritual attributes of the Onyx . A perfect stone for nighttime wear, a black onyx pendant looks elegant and stylish in white or yellow gold. Wearing an aquamarine is said to help couples smooth out their differences and reawaken their love for each other making an aquamarine pendant the perfect anniversary present.