Cubic Zirconia: mesmerizing jewelry Radiant Cubic Zirconia is a heart-winning artificial, colorless gemstone that is formed by the cubic crystalline form of zirconium dioxide. It is one of the most popular diamond alternatives because of its exceptional brilliance that aptly imitates diamonds’ sparkle and its highly affordable price. This is the perfect option for you if you want to flaunt the diamond-like luxury without pushing your pocket. Another reason you can hop on to the Cubic Zirconia Jewelry is that it rates around 8.5 on the Mohs hardness scale, making the stone durable enough to wear regularly.