Lab grown diamonds are as real as diamonds mined from the earth. Lab grown diamonds are identical to earth mined diamonds in every way, except that they are grown in a lab. They have the same chemical, physical, and optical properties as a mined diamond.
Earth-mined diamonds are just as they sound. This is the traditional way we get our diamonds. They are natural minerals that are mined from the earth. A diamond is made up of carbon and forms under the pressure of the earth