Which is better for gem identification, gac or gic? More promising? Provide integral

GIC is a big qualification certificate. GAC is a certificate of National Treasure Association. When I was studying, I took the GAC exam, from the market point of view. GIC is more authoritative. At least GAC is a certificate. Take the road of identification now, and the future is hard to say. First of all, the monitoring station mainly relies on infrared spectrum for analysis and identification. Second. People who have just obtained the certificate don't have much practical experience, and others will think that the credibility is too low and won't believe you.

My humble opinion is that I graduated from jewelry major, but it's not big.