Cubic Zirconia is the cubic crystalline form of zirconium dioxide.
CZ is meant to look like precious gems but possess none of the hardness or durability of the real thing. They wear quickly and become dull and are not suitable for rings worn on a daily basis.
Calla Gold’s Professional Opinion on Cubic Zirconia
CZ’s are fine for earrings, pendants or rings worn occasionally. They are very inexpensive.
Read more about my thoughts on CZ here: CZ vs Diamond for Your Engagement Ring