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 . Black and gold make a beautiful and elegant combination. A black onyx ring is a perfect accessory for any outfit. Pink tourmaline is a birthstone of October, along with opal, and is a truly special gem. The deep rosy color of a pink tourmaline ring will be sure to attract attention.