Cubic zirconia can replace all raw materials for grinding fake diamonds because it has very similar properties to real diamonds. Firstly, cubic zirconia has a refractive index of 2. 17 and a dispersion of 0.06, which is close to and homogeneous with diamond. The hardness of cubic zirconia is as high as 8.5, which enables it to be embedded in jewelry for a long time without being scratched and polished to lose its luster. Cubic zirconia can produce products with excellent transparency and completely colorless. In this way, after grinding it into a gem, its appearance is very similar to that of a diamond. It is said that in the first few years of production, it was regarded as a real diamond, and some experienced people in the gem industry went there.

Of course, there are many differences between cubic zirconia and diamond; The first is hardness. Nothing can compare with diamonds, and cubic zirconia is no exception. In addition, the specific gravity of cubic zirconia is as high as 5.6-6, which is 1.6- 1.7 times that of diamond. If you can measure the specific gravity with an instrument, you can tell it right away. The commodity code of cubic zirconia is CZ, so the fake diamonds ground with it are often called "CZ diamonds". CZ diamonds are welcomed by customers because of their low price and similar appearance to diamonds. Not only ordinary people often wear jewelry with zircon diamonds, but also people who own real diamond jewelry usually wear jewelry with zircon diamonds for safety. The output of cubic chromium oxide is also increasing day by day, and the annual output of the United States alone has exceeded 1 100 million carats, that is, 200 tons.

Palladium is not qualified as a precious metal for jewelry in the world. At present, internationally recognized precious metals include platinum, gold, 18K gold and silver.