human
How can I tell the difference between a natural or synthetic diamond?
assistant
The best way to tell the difference between a natural and synthetic diamond is by looking at the stone under a microscope. Natural diamonds are made of carbon, while synthetic diamonds are created using a lab process that involves combining carbon with other elements such as hydrogen and nitrogen. Synthetic diamonds may also have different inclusions and impurities than natural diamonds, which can be seen under a microscope. Additionally, synthetic diamonds often have a higher refractive index than natural diamonds.