Now basically jewelry stores don't sell fake gold, because both factories and jewelry retail stores have rules to follow and strict inspections. When buying, you can tell whether it is real gold in two ways: by the mark on the jewelry. All jewelry must be printed with the manufacturer's logo, color and other factors in accordance with national requirements. At present, all gold ornaments such as Qianjinjin and Qianjinjin are printed with "pure gold", K gold ornaments are printed with "K750"18k "and" Au 750 ",and platinum ornaments are printed with" PT 900 ","PT 950 "and" All Platinum ". For specific requirements, you can search related Baidu terms and find them accordingly. Look at the certificate. The current appraisal institutions are also certified by the state. When testing, it is also machine testing. I am responsible for the results and it is good to see the certificate. However, there are fewer certificates for pure gold products and more certificates for inlaid products. For reference.