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Grading reports by the IGI on lab-grown diamonds will now include details of post-growth treatments.
The lab says previous reports have indicated only that lab-growns "may include post-growth treatments to alter color".
Thanks to advances in technology it says it can now it can confidently state whether a diamond was "as grown" or may have been treated.
For untreated CVD) and High HPHT diamonds, the new reports will outline the individual growth process and indicate specifically that the stones are "as grown with no indication of post-growth treatment."
The lab says previous reports have indicated only that lab-growns "may include post-growth treatments to alter color".
Thanks to advances in technology it says it can now it can confidently state whether a diamond was "as grown" or may have been treated.
For untreated CVD) and High HPHT diamonds, the new reports will outline the individual growth process and indicate specifically that the stones are "as grown with no indication of post-growth treatment."