1 "How are lab-grown diamonds made?"

Lab-grown diamonds are created by mimicking the natural conditions deep within the Earth, using either a "High Pressure High Temperature (HPHT)" method or a "Chemical Vapor Deposition (CVD)" method, where a small diamond seed is placed in a chamber and exposed to extreme heat and pressure, causing carbon atoms to crystallize and grow into a larger diamond around the seed; essentially replicating the process of natural diamond formation but in a controlled laboratory environment

Note: video credit to @traxnyc