Understanding Jadeite | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:55 3 years ago 23 532 Далее Скачать
Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:48 3 years ago 12 453 Далее Скачать
An Exclusive View of the World's Biggest Jade Auction | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:00:13 4 years ago 11 341 Далее Скачать
Untold Stories from GIA Field Gemology Expeditions (Part II) | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:21 3 years ago 3 069 Далее Скачать
The Unique Story of Natural Diamond | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 45:43 4 years ago 22 631 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
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
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
Tools of the Trade | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:46 4 years ago 15 016 Далее Скачать
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
The Sustainability Minefield | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:01:55 3 years ago 2 444 Далее Скачать
Superstitions Surrounding Gems and Jewelry | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 54:59 4 years ago 4 641 Далее Скачать
The History of Engagement Rings | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:33 3 years ago 17 603 Далее Скачать
Green Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 55:47 3 years ago 9 833 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
Diamond Color Treatment and Its Identification | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:24 4 years ago 16 252 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 5 999 Далее Скачать
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:05 3 years ago 15 052 Далее Скачать
