Friendship, love and loyalty are represented by this historic celtic design. A peridot claddagh ring with your birthstone or favorite color makes it even more significant. 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. Peridot is known as the gem of spirit and expression and is the birthstone for the month of August. You are currently viewing the items below in 14K Gold.