Carlsbad, CA 92008, USA |
2
Beckman
Institute Pasadena, CA 91125, USA |
California Institute of Technology Pasadena, CA 91125-2500, USA |
4Mineral Sciences Department Natural History Museum of Los Angeles County Los Angeles, CA 90007, USA |
5
S Gemmological Institute Mogok 11201, Myanmar |
6
Greatland Gems and Jewelry Mogok 11101, Myanmar |
7 Gemological
Institute of America Bangkok 10500, Thailand |