Polymer-Impregnated Turquoise
A large “Persian” turquoise cabochon was impregnated with a material that was also present in cavities on its base.
Characterization of Emeralds from a Historical Deposit: Byrud (Eidsvoll), Norway
An emerald deposit at Byrud, in southern Norway, yielded significant quantities of crystals and gem rough in the late 19th and early 20th centuries.
Update on Ammolite Production from Southern Alberta, Canada
There have been a number of changes in Ammolite production from southern Alberta, Canada, since 2001.
GIA Gem & Jewelry Career Center Terms of Use
GIA Gem and Jewelry Career Center User Agreement and Disclaimer Notice
GIAへのリンク
GIAは、宝石や宝飾品に関する知識、基準、教育の主要な情報源であり、可能な限りいつでも教育を人々に提供することを使命の一つとしています。GIAのウェブサイトへ直接アクセスできるリンクが使用されるのをGIAは歓迎しています。また、GIA.eduやGIA宝石百科事典に直接リンクできるボタンを提供しており、御社のサイトに多大な視覚的要素も追加することが可能となります。
学資援助および奨学金の概要
GIAは、学生の皆さんの教育を支援するために、学資援助のオプションを数多く提供しています。各プログラムにはそれぞれに指定された資格要件があり、すべての学生に援助が提供されるというわけではありません。これらの学資援助のオプションに関する詳細は、以下を参照してください。


Fashioned Queen Conch Shell Bead
A Queen conch shell bead is submitted for pearl identification to the Mumbai laboratory.

Brown Zoning in Diamond
Strong linear brown zoning is observed in a Fancy Dark yellow-brown diamond.

Rainbow-Colored Partially Healed Fissure in Blue Sapphire
An iridescent partially healed fissure is observed in a blue sapphire from Sri Lanka.

Written Characters in Black Opal
Play-of-color patches in black opal display interesting written character patterns.
Radioactive Morganite
Two strongly orangy pink morganites with residual radioactivity were studied.

Jewelry Television in Tucson
A look at JTV’s history, current activities, and impact on the industry.

DNA Barcoding and Next-Generation Sequencing (NGS) of Freshwater Pearls
Freshwater pearls are the subject of GIA’s latest research involving the DNA barcoding and next-generation sequencing of biogenic materials.

Gems & Gemology at Ninety: Consistency and Change
An overview of the Summer 2024 Gems & Gemology content.

Citrine from Zambia
Large, clean citrine reportedly from the Kitwe deposit in Zambia is a welcome addition to the gem market.

GIA Student Design Showcase
A GIA student from the London campus receives recognition for a necklace design featuring baroque pearls, diamonds, and light pink garnets.

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