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Independently Certified Diamonds

We understand that purchasing a diamond is a significant investment. That is why each Clean Origin Lab Created Diamond is independently verified and graded using the same scientific rigor applied to mined diamonds.

We only partner with independent, internationally recognized laboratories, including GCAL and IGI. This gives us (and you!) confidence that the evaluation process is uniform and objective. Here's how it works:

  1. A fully certified, independent diamond grading laboratory evaluates the stone's unique attributes. These include cut, color, clarity, carat weight, polish, symmetry and other key characteristics. Evaluators use high precision microscopes and standardized scientific techniques designed for accuracy and consistency.
  2. The laboratory then issues a formal report, grading each attribute in detail. A visual “map” of the diamond further illustrates any inclusions or "birthmarks" that were formed during the creation of the diamond. This report includes a unique identification number and accompanies your diamond. View an example of Certificate from IGI

For added peace of mind, our center diamonds also feature a microscopic inscription of the unique identification number on the girdle of the stone. This laser inscription can only be seen under magnification and in no way impacts the beauty of the diamond. Because it never wears off, it functions like a VIN for your Clean Origin Lab Created Diamond - a guarantee that the stone you purchase today is the same one on display years from now.

An Inside Look At Our Top Laboratories

While we partner with several independent diamond certification laboratories, the two most prominent are IGI (International Gemological Institute) and GCAL (Gem Certification and Assurance Lab). Both employ some of the world’s leading diamond graders and are internationally recognized for their expertise in evaluating both mined and lab grown diamonds.

  • IGI was founded in 1975 in Antwerp, Belgium, a long-standing hub for diamond craftsmanship and trading. The lab pioneered several innovations in the diamond evaluation process and trains some of the world’s top gemologists. Click here to learn more about IGI’s contributions to the science behind diamond grading.
  • GCAL was founded in 2001 in New York City and has built a reputation for their Guaranteed Diamond Certifications. This means they ensure the assigned cut, color and clarity grades as well as carat weights of the diamonds they evaluate. Click here for a behind-the-scenes look at GCAL’s diamond grading process.