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 Lab Pink Sapphire celtic knot combines these concepts with the spiritual attributes of the Lab Pink Sapphire . A sapphire is said to bring serenity and purity to the wearer. Wear a pink sapphire pendant for serenity and purity with a splash of fun and irreverence. A perfect stone for nighttime wear, a black onyx pendant looks elegant and stylish in white or yellow gold.