Large Natural Diamonds with Asteriated Cloud Inclusions
Two natural diamonds containing cloud inclusions that resemble stars are examined in the Carlsbad laboratory.
International Jewelry Tokyo 2024
G&G Facebook Group Surpasses 40,000 Members
Heliodor and Aquamarine with Surface Etching
Hexagonal etch features are observed on the prismatic faces of heliodor and aquamarine crystals.
Gem-Quality Anorthoclase Feldspar from Southeast Vietnam
Characterizes an anorthoclase variety of alkali feldspar found in southeast Vietnam and evaluates its potential for commercial use.
Gemological and Trace Element Characteristics of Cassiterite from Yunling, China
Examines gem-quality cassiterite from southwest China and analyzes trace element chemistry to distinguish it from Bolivian cassiterite.
Square-Shaped Cloud in Diamond
A natural faceted diamond displays a prominent square-shaped cloud under the table.
Micro-Features of Tourmaline
Provides a visual guide to the internal features of tourmaline as well as tourmaline inclusions in other gem hosts.
Laboratory-Grown Diamonds: An Update on Identification and Products Evaluated at GIA
Reviews the advancements and major trends in laboratory-grown diamonds observed by GIA since 2007.
GIA Student Design Showcase
A GIA student from the New York campus receives recognition for a necklace design featuring diamonds, lavender jade, and akoya pearls.
悼念：GIA 理事 Rodney Ewing（罗德尼·尤因）博士
Rodney Ewing（罗德尼·尤因）博士在 2006 年至 2015 年间任 GIA 理事会成员，于本月初逝世，享年 77 岁。
悼念：GIA 理事 Rodney Ewing（罗德尼·尤因）博士
Rodney Ewing（罗德尼·尤因）博士在 2006 年至 2015 年间任 GIA 理事会成员，于本月初逝世，享年 77 岁。
GIA Alumni Celebrate 50ᵗʰ Reunion of First New York Graduating Class
Members of the first class to complete the GIA Graduate Gemologist® program in New York City gathered.
GIA准备连串活动参与拉斯维加斯珠宝展
Experience the world of gemology in person with GIA at Couture and JCK Las Vegas.
The Appeal of Non-Nacreous Pearls
Several vendors offered a variety of impressive non-nacreous pearls at the Tucson gem shows.
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