Step 2: Advanced Gemology
|Synthetic Diamond History|
High Pressure High TemperatureDiamonds were first synthesized from graphite in the 1950s by the high pressure high temperature (HPHT) process. In the mid-1980s the process was modified to create diamond film.Chemical Vapor Disposition
Later chemical vapor disposition (CVD) improved diamond film production.
In the mid-1990s, diamond-like coatings (DLC) improved on CVD, requiring less temperature and less energy.
Cutting tools, optical windows for
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