Diamonds need to be curated no matter what. With lab grown diamonds, there are further steps that need to be accounted for. The uninformed are only told about the 4cs. The informed does a bit of self-research to learn about the cut: table, depth, angles, girdle, and cutlet. These are all just the basics of doing research, but there is a lot more details to lab grown diamonds such as growth method and in person diamond vetting.
There are two current methods to creating a diamond, HPHT and CVD. With a certification, you would be able to find the method that was used. HPHT, High Pressure High Temperature, is the first method to create a diamond using the same elements that took millions of years to form a diamond in Earth.