What does cz stamped jewelry stand for?

Zirconia CZ = Zirconia is imitation diamond made ​​by man. Cubic Zirconia ( or CZ ), is the cubic crystal form of zirconium dioxide (ZrO 2 ). The synthesized material is hard, optically flawless and usually colorless , but may be used in a variety of different colors. Should not be confused with zircon , which is a zirconium silicate ( ZrSiO 4 ). Because of its low cost, durability , and close visual likeness to diamond synthetic cubic zirconia has remained the largest and economically important competitor gemologically for diamonds since 1976. Its main competition as a synthetic gemstone is the more recently cultivated material , synthetic moissanite