1. State Key Laboratory of Materials Processing and Die & Mould Technology
2. School of Materials Science and Engineering
3. Huazhong University of Science and Technology (HUST)
4. Wuhan 430074
5. P. R. China
6. State Key Laboratory of Precision Measuring Technology and Instruments
7. Tianjin University
8. Tianjin 300072
9. Gemmological Institue
10. China University of Geosciences