An Overview of Pearl Identification Techniques | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:58 4 years ago 9 632 Далее Скачать
Diving into the GIA 7 Pearl Value Factors™ | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:43 4 years ago 6 000 Далее Скачать
Gemstones from the Sea | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:07 3 years ago 5 783 Далее Скачать
Highlights from Gems & Gemology: Spring 2021 Issue | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:24 3 years ago 3 601 Далее Скачать
Fascinating World of Pearls and Shells | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:10:25 4 years ago 13 189 Далее Скачать
Tools of the Trade | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:46 4 years ago 15 016 Далее Скачать
X-Rays and Their Use in Gemology | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:15:46 3 years ago 7 196 Далее Скачать
Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:48 3 years ago 12 454 Далее Скачать
The Microworld of Gemstones | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:10:32 4 years ago 14 600 Далее Скачать
Melee Diamond Analysis | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:00 3 years ago 7 219 Далее Скачать
Laboratory-Grown Diamonds: Updates and Identification | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:03:52 4 years ago 85 065 Далее Скачать
Understanding Jadeite | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:55 3 years ago 23 532 Далее Скачать
The History of Diamond Cutting and Polishing Technology | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:09:47 4 years ago 13 114 Далее Скачать
The Unique Story of Natural Diamond | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 45:43 4 years ago 22 632 Далее Скачать
Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:12:13 4 years ago 107 111 Далее Скачать
