April Birthstone: The History and Meaning of Cubic Zirconia As mentioned above, Cubic Zirconia Birthstone for people born in April under the zodiac signs of Aries (March 21 to April 20) and Taurus (April 21 to May 20). April-born babies are quite competitive, intelligent with full of enthusiasm. They carry a bold, and ambitious personality towards their goals and work hard with utmost dedication and determination. Here, incorporating Cubic Zirconia as their birthstone helps them embrace their favorable features and works as an antidote to provide protection against negativity and other roadblocks. Some say that wearing Cubic Zirconia Jewelry invites strength, happiness, and longevity to April ascendents.