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 Ruby celtic knot combines these concepts with the spiritual attributes of the Lab Ruby . Ruby signifies passion and unbridled, unrestrained love, making a pair of ruby earrings a perfect Valentine's day gift. A pair of created pink sapphire earrings make an excellent gift. Pink gemstones are stylish and chic, and our lab-created pink sapphires are an affordable alternative.