The International Gemological Institute (IGI) began certifying lab-grown diamonds in 2005. This certification process involves assessing the quality and characteristics of lab-grown diamonds using the same standards applied to natural diamonds, including the 4Cs (cut, color, clarity, and carat weight).

Since then, IGI has played a significant role in providing independent grading and certification services for lab-grown diamonds, helping to establish credibility and transparency in the lab-grown diamond market. The certification process ensures that consumers have access to accurate and reliable information about the quality and value of lab-grown diamonds when making purchasing decisions.