133 тысяч подписчиков
43 видео
Gem-A Conference 2023
Gem-A Conference 2022
Welcome to GemIntro, Gem-A's online entry-level qualification
Laboratory-grown Diamonds Comparative Analysis of Portable Instruments for Screening and ID
Sustainability in Gem Sourcing
Gem-A Live: In discussion with... the editor | 19 January 2022
The analytical challenges in testing melee-sized diamonds and coloured stones
Tourmaline as a Gemstone
Gemmological Discoveries at the French Museum of Natural History
Gem-A Live: In discussion with... the editor | 6 October 2021
Innovations in responsible sourcing of gemstones: an update from East Africa
Aquamarine & Co | Colour Mechanisms and Enhancements in the Beryl Group
Gem-A education: How to use the conoscope
