Diving into the GIA 7 Pearl Value Factors™ | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:43 4 years ago 6 000 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
Fascinating World of Pearls and Shells | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:10:25 4 years ago 13 189 Далее Скачать
How GIA Evaluates Surface, One of the GIA 7 Pearl Value Factors™ by GIA GIA (Gemological Institute of America) 1:37 10 years ago 3 732 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
How GIA Evaluates Matching, One of the GIA 7 Pearl Value Factors™ by GIA GIA (Gemological Institute of America) 2:04 10 years ago 2 132 Далее Скачать
How GIA Evaluates Luster, One of the GIA 7 Pearl Value Factors™ by GIA GIA (Gemological Institute of America) 2:33 10 years ago 17 341 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
Understanding Jadeite | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:05:55 3 years ago 23 532 Далее Скачать
Diamond Exploration & Mining | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:04 4 years ago 10 914 Далее Скачать
Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 58:48 3 years ago 12 450 Далее Скачать
Minerals Discovered and Named at GIA | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 59:51 3 years ago 4 833 Далее Скачать
A Gemstone’s Journey through the GIA Laboratory | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:21 3 years ago 5 003 Далее Скачать
Melee Diamond Analysis | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 57:00 3 years ago 7 219 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
Identifying Mineral Inclusions in Diamonds | GIA Knowledge Sessions Webinar Series GIA (Gemological Institute of America) 1:01:42 3 years ago 22 007 Далее Скачать
