<human>: How can I tell if a diamond is natural or synthetic?
<bot>: Natural diamonds are formed deep in the Earth’s crust, while synthetic diamonds are created in a laboratory. Natural diamonds have a characteristic chemical makeup that is different from synthetic diamonds and can be identified by their physical properties such as color, clarity, cut, and carat weight. You may also look for signs of inclusions and blemishes to determine whether a diamond is natural or synthetic.