human
How can I tell the difference between a natural diamond and a synthetic one?
assistant
The most obvious way to tell the difference between a natural diamond and a synthetic diamond is by looking at them. Natural diamonds are formed in nature, while synthetic diamonds are made in a lab using a process called chemical vapor deposition (CVD). Natural diamonds have a distinctive color and clarity, which can be used as an indicator of its origin. Additionally, synthetic diamonds may contain impurities that give it a yellow or brown tint, and they may also lack the characteristic fire and sparkle of natural diamonds.