Pearls are composed of calcium carbonate in minute crystalline form, which has deposited in concentric layers creating a beautiful round and smooth pearl. Pearls are a classic and unique choice for an engagement ring. Wear the story of your love with pearl engagement rings from Kay, whether itās your partners birthstone or favorite color a pearl engagement ring will a beautiful choice. Kay has a wide range of styles to choose from to find your partner the ring of their dreams. Make today the day you say yes to the ring!