CZ's full name is Cubic Zircon, it is a kind of man-made diamond, some body call it diamante or Zirconia Diamond.
It is not so expensive than diamond, but it may be more shining and better effect if it is cut in a precious way and in a precious angle and in a good technique. It is also called a semi-precious stone.
Color CZ is more expensive than white CZ, and bigger CZ is more expensive than smaller CZ, it is sold at gram or piece but not in carat. But some body sell it at carat in order to sell it at really high price. CZ is generally inlaid in silver jewelry to match the silver value.
