Shandong Gold Jewelry Jade Product Quality Supervision and Inspection Center is reliable. Shandong Gold, Jewelry and Jade Product Quality Supervision and Inspection Center has a legitimate third-party impartial status, and mainly undertakes the quality supervision and inspection, entrusted inspection and judicial appraisal of gold, jewelry and jade products in Shandong Province. The administration belongs to Shandong Metrology Institute, and the quality inspection center has passed the national metrological certification, examination and acceptance and laboratory accreditation. The inspection capacity includes: all inspection of precious metals such as jewelry and jade, diamond grading, gold products, silver products, platinum products, palladium products, precious metal plating products, cultured pearls grading, gold foil and so on.