Cubic Zirconia jewelry, also known as CZ or CZ diamonds, cubic Zirconia was born as an affordable alternative to natural diamonds. Cubic Zirconia jewelry is the most popular choice among man made diamonds. They come in every color imaginable at a fraction of the cost of other precious stones. The cubic zircon necklace is made of the brilliant cubic zircons. You can see the cubic zircon necklace on any occasion. Usually, they are matched with cubic zircon bracelet, cubic zircon ring and cubic zircon brooch.