GIA Research — Not Just for Scientists | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:35 4 years ago 3 356 Скачать Далее
Laboratory-Grown Diamonds: Updates and Identification | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:03:52 4 years ago 84 534 Скачать Далее
Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:48 2 years ago 11 978 Скачать Далее
Field Gemology: A Research Based Approach to Origin Determination | GIA Knowledge Sessions Webinar GIA (Gemological Institute of America) 37:34 4 years ago 8 121 Скачать Далее
Rubies: Connecting Sources, Treatment and Science | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:01:30 4 years ago 15 647 Скачать Далее
Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:12:13 4 years ago 105 910 Скачать Далее
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:05 2 years ago 14 653 Скачать Далее
A Gemstone’s Journey through the GIA Laboratory | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:21 3 years ago 4 886 Скачать Далее
Understanding Jadeite | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:55 3 years ago 23 098 Скачать Далее
The Unique Story of Natural Diamond | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 45:43 4 years ago 22 327 Скачать Далее
The History of Engagement Rings | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:33 3 years ago 17 506 Скачать Далее
A Look at Kimberlites: The Volcanoes that Carry Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:07:41 3 years ago 30 560 Скачать Далее
Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:21 3 years ago 17 050 Скачать Далее
Green Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 55:47 3 years ago 9 678 Скачать Далее
An Overview of Pearl Identification Techniques | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:58 4 years ago 9 447 Скачать Далее
Gemstones from the Sea | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:07 3 years ago 5 651 Скачать Далее
Natural Blue Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:09 3 years ago 6 835 Скачать Далее
Laboratory-Grown Diamonds from China | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:04 4 years ago 12 825 Скачать Далее
Tools of the Trade | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:46 4 years ago 14 644 Скачать Далее
