A Study of the Winston Red: The Smithsonian’s New Fancy Red Diamond
Presents the first scientific and historical study conducted on the 2.33 ct Winston Red, the fifth-largest known Fancy red diamond in existence.
“Enhydro” Amethyst from Morocco
A rare find of Moroccan amethyst with eye-visible fluid inclusions is spotted at the Pueblo show.
Heated Corundum, the Remarkable Winston Red, and an Extraordinary Renaissance Jewel
An overview of the Spring 2025 Gems & Gemology content.
Rare Gem-Quality Viitaniemiite
“Rime Ice” on Trees in Jeremejevite
Crystal inclusions in a natural diamond resemble a unique scene.
Surfite: A Surfboard Manufacturing Byproduct
Crystal inclusions in a natural diamond resemble a unique scene.
GIA 採用全新實驗室培育鑽石描述術語
Beginning later this year, GIA will start using descriptive terms to characterize the quality of laboratory-grown diamonds
GIA 採用全新實驗室培育鑽石描述術語
Beginning later this year, GIA will start using descriptive terms to characterize the quality of laboratory-grown diamonds.
G&G in a Flash: Glowing Gems - What Does Fluorescence Tell Us?
Learn about the principles, mechanisms, and characteristics of luminescence that create the impressive and memorable glow of gemstones.
GIA美國寶石研究院宣佈將GIA珍珠分級報告引入更詳細珍珠層評級
GIA Introduces Expanded Nacre Scale to All Pearl Classification Reports
GIA is introducing an expanded approach to evaluating nacre on all pearl classification reports
GIA GemKit 將寶石科學帶入不同課堂
Young students anywhere in the world can now experience the wonder of gems and minerals with GemKit™ by GemKids®, an online treasure trove of information and activities from GIA®, the Gemological Institute of America, the 90-year-old global leader in gem and jewelry education.
GIA GemKit 將寶石科學帶入不同課堂
Young students anywhere in the world can now experience the wonder of gems and minerals with GemKit™ by GemKids®, an online treasure trove of information and activities from GIA®, the Gemological Institute of America, the 90-year-old global leader in gem and jewelry education.
GIA 擴展杜拜和香港鑑定所的服務範圍
GIA will temporarily expand services offered by the GIA Laboratories DMCC and the GIA Hong Kong laboratory.
GIA 擴展杜拜和香港鑑定所的服務範圍
GIA will temporarily expand services offered by the GIA Laboratories DMCC and the GIA Hong Kong laboratory.
Famed Neuroscientist to Open AGS X GIA Converge Conference
Neuroscientist and perception expert Dr. Beau Lotto will be the opening keynote speaker at Converge
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