GIA檢測34.59克拉化學氣相沉積法（CVD）實驗室培育鑽石
CVD Diamond Over 34 Carats Examined in GIA’s Hong Kong Laboratory
A look at the largest CVD diamond GIA has encountered to date.
GIA Adds “Peacock” Color Range Comment to All Pearl Reports
GIA is adding a report comment employing the trade color term “Peacock” for designated colors of cultured pearls from the Pinctada margaritifera black-lipped pearl oyster, commonly known as Tahitian pearls.
GIA Adds “Peacock” Color Range Comment to All Pearl Reports
GIA is adding a report comment employing the trade color term “Peacock” for designated colors of cultured pearls from the Pinctada margaritifera black-lipped pearl oyster, commonly known as Tahitian pearls.
Need-Based Scholarships Offered by GIA Year-Round
GIA’s industry-leading and globally-recognized diploma and certificate programs educate professionals with the skills needed for success in the gem and jewelry industry.
GIA恢复提供纸质版钻石鉴定精简版报告
GIA will return to producing printed GIA Diamond Dossier reports beginning April 9.
GIA Returns to Printed Diamond Dossier Reports
GIA will return to producing printed GIA Diamond Dossier reports beginning April 9.
Starry Night in Diamond
Cloud inclusions resembling stars at night are observed in a faceted diamond.
GIA Library’s Exhibit on Mercury-Free Mining Wins Award
GIA Library’s Exhibit on Mercury-Free Mining Wins Award
Career Fair – Powered by GIA is Back in New York
Career Fair – Powered by GIA is Back in New York
GIA’s 6thAnnual Jewelry Design Competition Highlights Emerging Talent
As a leading educational institute, GIA helps educate the next generation of gem and jewelry professionals in gemology, jewelry design and jewelry manufacturing arts.
GIA’s 6thAnnual Jewelry Design Competition Highlights Emerging Talent
As a leading educational institute, GIA helps educate the next generation of gem and jewelry professionals in gemology, jewelry design and jewelry manufacturing arts.
GIA Researchers Identify New Spinel Treatment
Scientists at the GIA laboratory in New York City recently discovered spinel treated by nickel diffusion in a parcel of gems acquired for research purposes by the GIA research team in Bangkok.
GIA Researchers Identify New Spinel Treatment
Scientists at the GIA laboratory in New York City recently discovered spinel treated by nickel diffusion in a parcel of gems acquired for research purposes by the GIA research team in Bangkok.
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.
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