Of course, there are appraisal stations ... basically in every big city, especially in cities with relatively developed jewelry (Shenzhen, Guangdong, Southeast Asia, East China Sea, Kunming, Xi 'an, mangshi, Ruili, Tengchong) ... Of course, the current appraisal stations are mixed ... The landlord had better find an authoritative certificate ... such as the national inspection center, medium and large ones are good.

I hope I can help you. If you don't know anything, ask me. I am a student of jewelry appraisal.