IGI Reaffirms Equal Grading Standards for Lab-Grown and Natural Diamonds

The International Gemological Institute (IGI), the leading grader of lab-grown diamonds globally, has confirmed it will continue applying the universal 4Cs grading to all diamonds, whether natural or lab-grown. This affirmation comes as many in the industry grapple with the unprecedented shift by others to a different, diluted scale for lab grown diamonds sent to their locations.

IGI pioneered lab grown diamond grading in 2005. Recognizing their identical properties to natural diamonds, IGI applied the existing 4Cs to prevent industry and consumer confusion, mirroring the approach taken in the cultured pearl market.

 The statement released by the institute reads: “Since inception, IGI has remained steadfast in its mission as an independent, third-party authentication body - unbiased, and free from external influence. Our commitment to transparency, integrity, and scientific accuracy has earned us the trust of consumers, manufacturers, and retailers around the world. Every diamond we certify undergoes a rigorous 14-step grading process, carried out by expert gemologists using state-of-the-art equipment - upholding accuracy, impartiality, and trust at every step.

 A Global Leader with Recognized Credentials

 With 31 laboratories across 10 countries, IGI operates the world’s largest gem lab network. Our leadership in diamond and gemstone certification is built on:

• ISO 17025 accreditation, validating our technical precision and adherence to international standards.
• Big Four as our internal auditors, reinforcing robust internal governance.
• Membership with the Responsible Jewellery Council (RJC), reflecting our ethical responsibility and sustainability commitment.
• Uniquely, IGI is the only gemological laboratory in the world listed on the stock exchange, underscoring our financial transparency and global accountability.

IGI Reaffirms Its Commitment to Full 4Cs Grading Standards for Natural and Lab-Grown Diamonds. For nearly a century, the 4Cs - Cut, Color, Clarity, and Carat - have served as the universal language for assessing diamond quality. At IGI, we uphold these standards not merely out of tradition, but from a deep-rooted belief in the consumer’s right to transparency, knowledge, and confidence. At IGI, we’re not just grading diamonds - we’re safeguarding the trust that consumers place in us.”

The International Gemological Institute (IGI), a Blackstone-backed company, is India’s largest independent accreditation and certification services provider with a 50% market share. With 31 laboratories and 18 Schools of Gemology in 10 countries, IGI's global presence enables it to capitalize on the ongoing transformation in the industry. For 50 years, IGI has provided the fine jewelry community and consumers with a broad range of services, including natural and laboratory-grown diamond reports, colored stone grading and origin reports, as well as jewelry identification and appraisal reports. With the rise of lab-grown diamonds, IGI screens millions of natural and lab-grown diamonds to ensure that the industry and consumers receive the product they expect. Regardless of location or marketplace, authentic IGI Laboratory Reports empower trust and confidence among buyers and sellers alike.