/Feel free to look it up ~ ~ But if you want to know the original intention of the GIA standard, it's simple. There is a difference between national testing and GIA testing in general jewelry appraisal centers. After all, GIA is the American standard, and domestic testing is the national standard, which is stricter than GIA. Now the society is an economic society, and it is easy for you to have friends who evaluate it. Everything else is commercialized. If you are in Hunan, I can give you a free appraisal. Beijing Gaode Jewelry Appraisal Institute is a good one.