Rhino Ruby, Mozambique (22.04 ct), ca. 500 million years old
Burma Ruby, ca. 30-25 million years old
36th IGC Conference | August 2019
| AGE D ATI N G AP P L I E D AS A TE S TI N G P R O CE D U R E TO GE MS TO N E S AN D B I O GE N I C MATE R I AL S Michael S. Krzemnicki, Hao A.O. Wang, Myint M. Phyo | 36th IGC Conference, Nantes (France) | August 2019 | PAGE 1