<human>: Which is better, a natural or synthetic diamond?
<bot>: A synthetic diamond is generally considered to be of higher quality than a natural diamond. Synthetic diamonds are created in a laboratory by combining carbon atoms under high pressure and temperature. Natural diamonds are formed deep within the Earth’s mantle and crust over hundreds of millions of years. The difference between the two can often be seen in their appearance, with natural diamonds being much more transparent. Additionally, synthetic diamonds are usually more uniform in color, size, and shape.