Видео ютуба по тегу Gia Gemstone

Red Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series
Red Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series
Как стать геммологом? | Как начать карьеру в геммологии
Как стать геммологом? | Как начать карьеру в геммологии
How to Choose a Diamond: Four-Minute GIA Diamond Grading Guide by GIA
How to Choose a Diamond: Four-Minute GIA Diamond Grading Guide by GIA
The Glory of a Faceted Emerald by GIA
The Glory of a Faceted Emerald by GIA
Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series
Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series
Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
Sending diamonds to GIA - The Process for sending diamonds and Gemstones to GIA
Sending diamonds to GIA - The Process for sending diamonds and Gemstones to GIA
GIA’s Professional Education by GIA
GIA’s Professional Education by GIA
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series
Natural Blue Diamonds | GIA Knowledge Sessions Webinar Series
Natural Blue Diamonds | GIA Knowledge Sessions Webinar Series
Gems of Northern Madagascar
Gems of Northern Madagascar
Green Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series
Green Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series
Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
How to Use the GIA iD100®
How to Use the GIA iD100®
Gem-A Live: Understanding Gemstone Species and Varieties
Gem-A Live: Understanding Gemstone Species and Varieties
A Glimmer of Hope: The World's Most Famous Blue Diamond | GIA Knowledge Sessions Webinar Series
A Glimmer of Hope: The World's Most Famous Blue Diamond | GIA Knowledge Sessions Webinar Series
Laws and Ethics of Emerald Mining in Brazil by GIA
Laws and Ethics of Emerald Mining in Brazil by GIA
The Microworld of Gemstones | GIA Knowledge Sessions Webinar Series
The Microworld of Gemstones | GIA Knowledge Sessions Webinar Series
How to Read a GIA Grading Report Video by GIA
How to Read a GIA Grading Report Video by GIA
Varieties of Alexandrite by GIA
Varieties of Alexandrite by GIA
Tools of the Trade | GIA Knowledge Sessions Webinar Series
Tools of the Trade | GIA Knowledge Sessions Webinar Series
Emerald Sources: The Grass is Greener on the Other Side | GIA Knowledge Sessions Webinar Series
Emerald Sources: The Grass is Greener on the Other Side | GIA Knowledge Sessions Webinar Series
How to Classify a Lead Glass–Filled Ruby by GIA
How to Classify a Lead Glass–Filled Ruby by GIA