Lab-grown diamonds are diamonds that were created by scientists in a lab. They share the same chemical makeup as natural diamonds, and are optically identical. The biggest differences between natural and lab-created diamonds are how they’re made, and how rare they are. Diamond is famously the world’s hardest material, but more than that it is one of the most alluring and desirable stones in the jewellery and gemstone world. The brilliance and fire so apparent in white diamonds make it the classic gemstone.