Tools of the Trade | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:46 4 years ago 14 542 Скачать Далее
GIA Knowledge Session, Special Edition: Tools for the Trade GIA (Gemological Institute of America) 30:00 4 years ago 7 988 Скачать Далее
GIA Research — Not Just for Scientists | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:35 4 years ago 3 331 Скачать Далее
The Art of Photographing Minerals, Gemstones and Jewelry | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:04:34 4 years ago 19 875 Скачать Далее
Diamond Exploration & Mining | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:04 4 years ago 10 706 Скачать Далее
Melee Diamond Analysis | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:00 3 years ago 7 069 Скачать Далее
An Overview of Pearl Identification Techniques | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:58 4 years ago 9 391 Скачать Далее
Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:48 2 years ago 11 851 Скачать Далее
Laboratory-Grown Diamonds from China | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:04 4 years ago 12 767 Скачать Далее
Green Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 55:47 3 years ago 9 622 Скачать Далее
Untold Stories from GIA Field Gemology Expeditions (Part II) | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:21 3 years ago 3 023 Скачать Далее
Laboratory-Grown Colored Gemstones: Crystal Growth Methods | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:05 3 years ago 8 648 Скачать Далее
