Opal from Ngawa Autonomous Prefecture (Aba Autonomous Prefecture), Sichuan, China
China | |
| Su Sun (1993): Gold Science and Technology 1(2), 4-10 |
www.cicresources.com (2006) http://www.cicresources.com/PDF_REPORTS/Pingding_F1ReportFinal.pdf |
China | |
| Su Sun (1993): Gold Science and Technology 1(2), 4-10 |
www.cicresources.com (2006) http://www.cicresources.com/PDF_REPORTS/Pingding_F1ReportFinal.pdf |