Field Gemology: A Research Based Approach to Origin Determination | GIA Knowledge Sessions Webinar GIA (Gemological Institute of America) 37:34 4 years ago 8 045 Скачать Далее
Wim Vertriest: “GIA’s Field Gemology Program and Origin Determination” GIA (Gemological Institute of America) 22:24 5 years ago 2 460 Скачать Далее
Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:48 2 years ago 11 641 Скачать Далее
Untold Stories from GIA Field Gemology Expeditions (Part II) | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:21 3 years ago 2 988 Скачать Далее
Rubies: Connecting Sources, Treatment and Science | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:01:30 4 years ago 15 442 Скачать Далее
Microfeatures of Gems: Geologic Implications | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:09:59 3 years ago 11 381 Скачать Далее
Emerald Sources: The Grass is Greener on the Other Side | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:03:33 3 years ago 12 680 Скачать Далее
Untold Stories from GIA Field Gemology Expeditions | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:16:41 4 years ago 6 575 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 105 120 Скачать Далее
GIA Research — Not Just for Scientists | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:35 4 years ago 3 295 Скачать Далее
Tools of the Trade | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:46 4 years ago 14 372 Скачать Далее
A Gemstone’s Journey through the GIA Laboratory | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:21 2 years ago 4 783 Скачать Далее
