No 2 kexi road, Nankai district, Tianjin 1. It has a laboratory of more than 10000 square meters, more than 100 patented technologies and papers, and participated in international and domestic capacity verification for more than a thousand times.

2. Gem Testing Center of Tianjin Geological Research Institute

No.4, No.8 Zhigu Road, Hedong District, Tianjin, is a comprehensive third-party testing service organization, which promotes scientific research and innovation step by step with academic research.

3. Tianjin Jewelry Appraisal Center

1999 10 was established on 10 on 8 October, and its business scope includes product development and design, information consultation, excluding intermediary services, arts and crafts (except gold and silver ornaments) and jewelry and jade appraisal instruments.

4. Linyi Gem Testing Center

1August 996 19 was established, and its business scope includes gem testing services. Projects that are subject to approval according to law can only carry out business activities after being approved by relevant departments.

5. Tianjin Gem Testing Center

In the scientific research of gemstones, the research on artificial synthesis, optimization, pearl improvement and jade fabric has been carried out successively, and many important achievements have been made.

Baidu Encyclopedia-National Gold and Silver Ornaments Quality Supervision and Inspection Center (Tianjin)

Baidu encyclopedia-sinosteel Tianjin geological research institute

Baidu encyclopedia-Tianjin Li Hua Tian ke jewellery detection technology co., ltd