In order to get diamonds, which are among the world’s hardest minerals, miners must go thousands of miles below the earth’s crust. However, lab-created diamond-like substances are now available. Synthetic diamonds may be grown in as little as two weeks using two different technologies. Diamond seeds, which are single-crystal diamonds, are needed for both methods in order to produce bigger stones.

High Temperature and High Pressure (H.P.H.T.)

First, gem-grade diamonds were created in the 1950s after decades of research on diamond synthesis. Carbon is dissolved into a diamond seed by heating and pressurizing to extreme temperatures and using a metal catalyst. This process, originally dubbed H.P.H.T. (high pressure, high temperature), mimics the earth’s crushing force to create a diamond seed. 3,000 degrees Celsius (almost 5,000 degrees Fahrenheit) is not out of the question here.

Deposition of Chemical Vapor in the atmosphere (C.V.D.)

Newer chemical vapor deposition processes employ lower pressures and smaller machinery, making it simpler for scientists to regulate and monitor the results of their research. As a consequence, C.V.D. is becoming more popular in the jewelry industry than H.P.H.T. In order to get carbon, it employs a vacuum chamber that is filled with hydrogen and methane. At very high temperatures, a plasma is formed from the gas, and carbon fragments are released. These bits are subsequently placed onto a diamond seed in the vacuum chamber. A 3-D printing-like procedure is used.

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