Take a look at our collection of stunning Irish and Celtic Pearl Earrings. The pearl is one of the birthstones for the month of June Pearl, the birthstone for June, has long been considered a symbol of purity. Natural or cultivated pearls are created when a mollusc creates layers of nacre around an irritant within its shell, and this process is known as pearl formation. Pearls are available in an incredible range of hues that will appeal to people of all ages. A pair of Celtic Pearl Earrings is considered to be a symbol of elegance and knowledge.