THE ALPHA Billiant cut Cubic Zirconia Stones achieve a new level of brilliance and radiance. Made in Europe by Preciosa Crystal, these Cubic Zirconia stones are a more affordable alternative to genuine diamonds. Cubic zirconia is the best synthetic stone of all diamond´s substitutes. It is an ideal raw material for the production of jewelry thanks to its hardness coming close to the hardness of ruby or sapphire, and optical properties close to those of diamond.