what should I be looking for in a lab grown diamond?” Ultimately, lab grown diamonds are produced at high rates in a labs - and the prices reflect this higher supply at roughly 70-80% less per carat than their natural diamond counterparts. That being said, you could argue that you would want all the highest characteristics in the lab grown stone you plan to purchase. However, based on my own experience and hundreds of lab grown diamonds I have researched, I may have some more specific advice on what to look for beyond “highest quality.” A good first question to ask is “what color lab grown diamond is best?”