Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:12:13 4 years ago 105 002 Скачать Далее
Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:04:18 3 years ago 19 389 Скачать Далее
Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:48 2 years ago 11 582 Скачать Далее
Gemstones from the Sea | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:07 3 years ago 5 538 Скачать Далее
Diamond Color Treatment and Its Identification | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:24 4 years ago 15 418 Скачать Далее
Natural Green Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:17 3 years ago 12 954 Скачать Далее
The Unique Story of Natural Diamond | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 45:43 4 years ago 22 078 Скачать Далее
Rough Diamonds: Natural Crystal Shapes & Surface Features | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:12 3 years ago 42 189 Скачать Далее
The Art of Photographing Minerals, Gemstones and Jewelry | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:04:34 3 years ago 19 715 Скачать Далее
Diamond Exploration & Mining | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:04 4 years ago 10 603 Скачать Далее
Green Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 55:47 3 years ago 9 503 Скачать Далее
Identifying Mineral Inclusions in Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:01:42 3 years ago 20 994 Скачать Далее
The Science Behind Fancy Color Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:55 3 years ago 13 177 Скачать Далее
