The Hindu

GIA not to use 4C system to grade lab-grown diamonds

The Gemological Institute of America (GIA), considered the world’s foremost authority on gemmology, said later this year, it will start using descriptive terms to characterise the quality of ...
Business Line

GIA to change lab grown diamonds grading methodology

The Gemological Institute of America, the world leader in diamond grading, will not use its internationally recognised 4Cs (cut, colour, clarity, and carat weight) grading system for laboratory-grown ...
Indiatimes

GIA to introduce new grading framework for LGD from Oct 1

Surat: The Gemological Institute of America (GIA), one of the world's leading diamond grading laboratories,will roll out a new grading system for lab-grown diamonds (LGD) from Oct 1, replacing ...
manilatimes

GIA Redefines Lab-grown Diamond Grading Standards Discontinuation of 4Cs Grading System Enhances Differentiation Between Natural and Lab-Grown Diamonds

HONG KONG SAR - Media OutReach Newswire - 10 June 2025 - The Gemological Institute of America (GIA), the world's foremost authority in gemology announced a redefinition in diamond grading on June 2, ...
Indiatimes

No more 4C grading, now lab-grown diamonds are 'premium' or 'standard'

The Gemological Institute of America (GIA) will discontinue applying the 4Cs grading system to lab-grown diamonds, opting for simplified descriptors like 'premium' or 'standard'. This move ...