Cultivation diamond refers to artificial diamond, which is a polycrystalline diamond formed by crystallization and polymerization of diamonds with a diameter of 10 to 30 nanometers. The molecular structure of synthetic diamond is not the complete octahedral structure of natural diamond, but a complex structure, which will produce phosphorescence. With the maturity of artificial diamond production technology, its cost is low, and diamonds of various colors can be made, making a splash in the jewelry market.