While shopping undercover at some of Canada's top jewellers, Marketplace journalists came across sales pitches filled with false claims and inconsistent diamond grading reports, all of which could ...
As a large-scale diamond smuggling and grading manipulation case unfolded in Vietnam, the global diamond certification system has plunged into a crisis of trust. Consumers cannot tell diamond color, ...
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 ...
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