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
The Sapphires of Montana | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:02 4 years ago 13 614 Далее Скачать
Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:21 3 years ago 17 588 Далее Скачать
Understanding Jadeite | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:55 3 years ago 23 531 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
Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:12:13 4 years ago 107 109 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
A Glimmer of Hope: The World's Most Famous Blue Diamond | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:16 2 years ago 10 742 Далее Скачать
Unusual Phenomenal Colored Stones | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 53:11 3 years ago 11 529 Далее Скачать
Rubies: Connecting Sources, Treatment and Science | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:01:30 4 years ago 15 924 Далее Скачать
Natural Blue Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:09 4 years ago 6 988 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
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
Gems of the Southwest | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:03:42 3 years ago 4 857 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
Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:04:18 3 years ago 19 763 Далее Скачать
Furnaces, Fluxes and Filling: A Review of Ruby Treatment | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:04:54 4 years ago 13 456 Далее Скачать
The Latest Discoveries from Gems & Gemology | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 54:04 3 years ago 8 124 Далее Скачать
