In addition to their bridal jewellery beauty, pearls possess certain meanings when it comes to a wedding day. Purity; similar to the traditional meaning of a white dress, cultures throughout the ages have believed pearls symbolise purity. Happiness; it is said that wearing pearls on your wedding day will bring a happy marriage.  A Customary Gift; it is common for a groom to give his bride a piece of pearl jewelry on their wedding day. In some families, it is actually tradition for the future mother-in-law of the bride to hand down pearls that belong to her, or gift her daughter-in-law with a new set.