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Is there a difference between Songshi national inspection certificate and land certificate?
Yes

1. Different issuing agencies: Songshi National Inspection Certificate is issued by National Jewelry Quality Supervision and Inspection Center, and Dida Certificate is issued by Wuhan Jewelry Testing Center of China Geo University.

2. Different scope of application: the national certificate of turquoise inspection is mainly applicable to the appraisal and evaluation of turquoise and other precious stones, and the land certificate is mainly applicable to the appraisal and evaluation of geology and mineral resources.