Characterization of “Orange Peel” Surface Microstructure of White Nephrite from Russia: A Unique Pseudomorph Pattern
Examines correlations between surface microstructures and the orange peel effect in Russian white nephrite, proposing a formation model and revealing distinctive microfeatures specific to the material.
A Guide to Diamonds with the 480 nm Absorption Band
Summarizes the features of 480 nm band diamonds, including chameleon diamonds and those with unmodified orange hues, for rapid identification or advanced gemological testing.
External Morphology and Internal Zonal Structure of Macle Diamond
Investigates the morphological changes of macle diamonds during the growth process by exploring their three-dimensional internal zonal structure.
Gaseous Carbon Dioxide Phases in Paraíba Tourmaline
Immiscible two-phase fluid inclusions are investigated in a 0.48 ct Paraíba tourmaline.
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Susan Jacques荣获 GIA 表彰
11 月初，在加州卡尔斯巴德总部举行的 GIA 理事会会议上，研究院授予 Susan M. Jacques最高荣誉 — Richard T. Liddicoat杰出成就奖。
Susan Jacques荣获 GIA 表彰
11 月初，在加州卡尔斯巴德总部举行的 GIA 理事会会议上，研究院授予 Susan M. Jacques最高荣誉 — Richard T. Liddicoat杰出成就奖。
Extraordinary Large Bicolor Natural Rough Diamond
A 37.41 ct natural rough diamond with distinct pink and colorless zones is examined at GIA’s Botswana laboratory.
How GIA Analyzes Pearls from Start to Finish
Amit Dhamani被任命为 GIA India Laboratory Pvt. Ltd. 总经理
The board of directors of GIA India Laboratory Pvt. Ltd. (GIA India) has appointed Amit Pratihari as managing director, responsible for all aspects of GIA India’s gemological laboratories in Mumbai and Surat, as well as the GIA India school in Mumbai.
Amit Dhamani被任命为 GIA India Laboratory Pvt. Ltd. 总经理
The board of directors of GIA India Laboratory Pvt. Ltd. (GIA India) has appointed Amit Pratihari as managing director, responsible for all aspects of GIA India’s gemological laboratories in Mumbai and Surat, as well as the GIA India school in Mumbai.
How GIA Analyzes Colored Stones from Start to Finish
Quarterly Crystal: Unique Phantom in Diamond
“Sugar Plum” in Titanium-Diffused Blue Sapphire
A sugar plum–like frosted zircon cluster is observed in a blue sapphire.
Quartz Assemblage Imitating Emerald
A green stone in a pendant necklace is identified as a quartz assemblage at the New York laboratory.
New Väyrynenite Production from Nigeria
A new source of väyrynenite produces specimens in larger sizes with higher clarities than material from other sources.
Pezzottaite with Multiple Cat’s-Eyes
The Tokyo laboratory examined a purplish pink pezzottaite cabochon displaying multiple cat’s-eyes.
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