The diamond industry is facing a crisis after numerous reports surfaced of synthetic melee being sold undisclosed alongside natural diamonds in parcels.In October, the Rapaport Group issued a “trade alert” warning of “persistent reports that large amounts of synthetic lab-grown diamonds are being mixed with natural diamonds in parcels of melee and pointers.”Similar reports have come from Israeli publication Diamond Intelligence Briefs and The Times of India.“There are mixed parcels out there,” says Rapaport Group chairman Martin Rapaport. “I don’t believe people should think all is well. It really is a big concern if diamond people can’t trust their supply chain.”Rapaport notes this issue doesn’t really affect big diamonds, which are commonly sent to labs that can detect a stone’s origin. But smaller diamonds are generally not cost-effective to check.Jewelers Vigi