<human>: Can you tell me what is the difference between a man-made diamond and a natural diamond?
<bot>: The main difference between a man-made diamond and a natural diamond is in their origin. Natural diamonds are formed from carbon that has been subjected to extreme pressures and temperatures deep within the earth, while man-made diamonds are made by humans through a process known as high pressure and temperature synthesis. Man-made diamonds have similar properties to natural diamonds but lack some of the unique characteristics such as imperfections and impurities found in natural diamonds.