Starry Night in Diamond
Cloud inclusions resembling stars at night are observed in a faceted diamond.
GIA图书馆的无汞采矿展览获奖
GIA图书馆的无汞采矿展览获奖
GIA于纽约主办招聘会–助业界发掘人才和机遇
GIA支持策办的Powered by GIA招聘会将于3月13日上午九时三十分到下午三时三十分在纽约市贾维茨会议中心（Jacob K. Javits Convention Center）举行，有兴趣在宝石和珠宝行业发展的人才千万不要错过。
GIA于纽约主办招聘会–助业界发掘人才和机遇
GIA支持策办的Powered by GIA招聘会将于3月13日上午九时三十分到下午三时三十分在纽约市贾维茨会议中心（Jacob K. Javits Convention Center）举行，有兴趣在宝石和珠宝行业发展的人才千万不要错过。
Color Modification of Spinel by Nickel (Ni) Diffusion: A New Treatment in the Gem Market
GIA researchers report on a new nickel-diffusion treatment used to modify color in spinel and present criteria for identification.
A Partially Hollow Natural Blister Pearl Filled with Foreign Materials
A very large baroque white pearl is further examined in the Mumbai laboratory due to its suspicious heft.
Two Black Non-Nacreous Bead Cultured Pearls from Pinctada margaritifera
The Carlsbad laboratory identifies two non-nacreous bead cultured pearls from Pinctada margaritifera.
“Electromagnetic Wave” Inclusion in Mong Hsu Ruby
Fiber-optic illumination reveals an electromagnetic wave-like pattern of particles in a ruby from Myanmar.
An Extraordinarily Large Cat’s-Eye Emerald
The Tokyo laboratory examines a 126 ct cat’s-eye emerald from Brazil.
Unusual “Horsetail” and Columnar Inclusions in Demantoid
Examination of a yellowish green demantoid reveals fibers of serpentine in a randomly curved pattern and a columnar two-phase negative crystal.
Extremely Rare Hellandite Inclusion Found in a Mogok Ruby
A rare inclusion is reported in ruby from the Mogok mine for the first time.
A Closer Look at Internal Etch Channels in Diamond
The Carlsbad laboratory reports on a Fancy Deep brownish yellowish orange diamond featuring trigons within subsurface etch channels.
Four-Rayed Star Chrysoberyl
A unique combination of two intersecting cat’s-eyes is observed in chrysoberyl at the Tokyo laboratory.
Never Stop Innovating: Gem Artist Chi Huynh
Profiles a groundbreaking gem artist on a quest to bring new concepts, techniques, and products to the industry.
Composition and Spectral Characteristics of Porcelain-Treated Turquoise
Characterizes turquoise treated with an inorganic additive that dramatically improves the luster and color of low- and medium-quality material.
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