Diamonds are the birthstone of April. They have special meaning for those born in April, as they are thought to bring inner strength and create better relationships. Diamonds are also considered a symbol of eternal love, which is why they are used for engagement rings.
Monthly birthstones were first designated in 1912 by the American National Association of Jewelers. However, the origin of certain stones being associated with a particular month dates back to biblical times. At this time, a breastplate worn by a priest was decorated with 12 gems that ultimately became associated with the 12 signs of the zodiac. Thus, each stone was connected to a specific month.