Characteristics of Newly Discovered Amber from Phu Quoc, Vietnam
Offers the first detailed summary of amber from the Vietnamese island of Phu Quoc and a comparison with Baltic, Dominican, and Burmese material.
Natural Radioactivity in Select Serpentinite-Related Nephrite Samples: A Comparison with Dolomite-Related Nephrite
Uses gamma-ray spectrometry to directly measure internal radioactivity in green nephrite from deposits in Poland, Russia, Canada, and New Zealand.
Brilliance Exhibit at the Natural History Museum of Los Angeles County
A glimpse at the rare gems recently on display at the Natural History Museum of Los Angeles County’s Brilliance: The Art and Science of Rare Jewels exhibit.
A Gemological and Spectroscopic Study with Mobile Instruments of “Emeralds” from the Coronation Crown of Napoleon III
An examination of 45 gems from the coronation crown of Napoleon III, using nondestructive mobile spectroscopic and gemological testing methods.
The Type IIb De Beers Cullinan Blue Diamond
GIA’s New York laboratory reports on a 15.10 ct Fancy Vivid blue cut-cornered rectangular step cut named the De Beers Cullinan Blue diamond.
Inclusions in Gemstones
This installment of “Colored Stones Unearthed” explores inclusions in gems—how they form, how they are studied, and what they mean for gemologists and geoscientists.
The Shape of Ekanite
Discusses the unusual surface characteristics of ekanite from secondary deposits in Sri Lanka.
A Large Aquamarine with Unusual Etch Features from Xinjiang, China
Unique natural etch pattern and dissolution cavities are observed in a large aquamarine crystal.
Unusual Glass-and-Quartz Triplet Imitation of Emerald
A Look at Diamonds and Diamond Mining in Guyana
Reports on diamonds from Guyana’s alluvial deposits, including mining history and practices.
Three-Rayed Asterism in Quartz
Rare optical phenomenon observed in four star quartz cabochons from Brazil.
GIA 任命 Johanna Levy（约翰娜·利维）为环境、社会和治理项目副总裁
作为宝石学研究、教育以及以科学为基础的宝石鉴定与分级服务方面的领导者，GIA 目前正在积极拓展宝石原产地服务，致力于向零售商和消费者提供所需的钻石产地信息。
GIA 报告将于 2025 年实现数字化
作为宝石学研究、教育以及以科学为基础的宝石鉴定与分级服务方面的领导者，GIA 目前正在积极拓展宝石原产地服务，致力于向零售商和消费者提供所需的钻石产地信息。
Extraterrestrial-Like Inclusion in Mozambique Ruby
A 3.03 ct stone submitted to GIA’s Bangkok laboratory was identified as a ruby from Mozambique with no indication of heating.
Rare Blue Apatite Inclusion in Smoky Quartz
A very light blue hexagonal apatite inclusion is observed in natural smoky quartz.
Yellow Topaz from Germany, Emerald Mining in Austria’s Habachtal Region, a Return to Tucson, and More…
Mercury Free Mining Pilot Program
New Record Size for CVD Laboratory-Grown Diamond
The New York laboratory reports on a new record size for CVD laboratory-grown diamond.
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