Because diamonds are rare in output, beautiful in appearance and durable, under the marketing of some jewelers in the last century, diamonds have become the most sought after gems, and their prices have risen sharply, becoming the first among gems. The slogan "Diamonds last forever, one will last forever" has also set off a diamond craze in China, and many brides have put on diamond rings for some time.

Because of the huge sales value of diamonds and their simple chemical composition, many scientists began to ponder how to synthesize diamonds. After years of research, scientists finally synthesized diamonds at 1953, but limited by the technology at that time, the synthesized diamonds did not reach the gem level, and were rarely used in jewelry, but mostly used in industry.

Diamonds synthesized in the laboratory are also divided into two types: HPHT diamond and CVD diamond, and their processing methods: high pressure and high temperature and chemical vapor deposition are indicated respectively.

For a long time, artificial diamond technology has not made great progress. Until 20 10, Dr. Meng synthesized the largest colorless cut CVD diamond in the world, weighing 2.3 carats. Since then, the technology of synthetic diamond has developed to a new stage, which has also brought great impact to the diamond market.

There is no difference in quality between synthetic diamonds and natural diamonds in the laboratory. On the contrary, they are superior in quality and cannot be distinguished from each other in appearance. Even professional appraisers need professional instruments to distinguish them.

It is inevitable that artificial diamonds cultivated in the laboratory will be used in jewelry. Although some veteran diamond jewelers deliberately exaggerated the value of natural diamonds in an attempt to distinguish them artificially, in 20 18, the US Federal Trade Commission cancelled the distinction between natural diamonds and synthetic diamonds and defined them as diamonds.