GIA 檢驗世界第二大鑽石

In July 2025, staff from GIA, including GIA Executive Vice President and Chief Research and Laboratory Officer Tom Moses and Vice President of Research and Development Dr. Wuyi Wang, examined a rough diamond weighing 2,488.32 carats

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GIA 檢驗世界第二大鑽石

In July 2025, staff from GIA, including GIA Executive Vice President and Chief Research and Laboratory Officer Tom Moses and Vice President of Research and Development Dr. Wuyi Wang, examined a rough diamond weighing 2,488.32 carats

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GIA 於 10 月 1 日推出更新版的實驗室培育鑽石服務

GIA will launch revised evaluation services for D-to-Z laboratory-grown diamonds on October 1

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GIA 於 10 月 1 日推出更新版的實驗室培育鑽石服務

GIA will launch revised evaluation services for D-to-Z laboratory-grown diamonds on October 1

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How-To Guide: Testing Diamonds and Gems using UV Light

GIA developed this guide so retailers can use fluorescence tests to help identify gems right in their own stores.

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GIA 任命 Sriram Natarajan 為全球鑑定所高級營運副總裁

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GIA 任命 Sriram Natarajan 為全球鑑定所高級營運副總裁

Sriram 'Ram' Natarajan, previously managing director of GIA India Laboratory Private Limited (GIA India), has been appointed to a new role as senior vice president of laboratory operations.

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Two Exciting Panels Featured at AGS x GIA Converge

Industry leaders and some of GIA’s most experienced gemological experts will share their expertise and insights with participants at Converge

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Two Exciting Panels Featured at AGS x GIA Converge

Industry leaders and some of GIA’s most experienced gemological experts will share their expertise and insights with participants at Converge.

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GIA Tests the World’s Second Largest Diamond

360-degree video of the Motswedi diamond.

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GIA 宣布 Pritesh Patel 出任GIA主席兼行政總裁

The Board of Governors of GIA has named Pritesh Patel, currently GIA’s Chief Operating Officer, as the Institute’s President and Chief Executive Officer

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GIA 宣布 Pritesh Patel 出任GIA主席兼行政總裁

The Board of Governors of GIA has named Pritesh Patel, currently GIA’s Chief Operating Officer, as the Institute’s President and Chief Executive Officer.

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GIA Evaluates Historic Diamonds in Christie’s Magnificent Jewels Auction

GIA has evaluated more than 30 rare and historically significant jewels ahead of Christie’s Magnificent Jewels auction, taking place on June 17 in New York.

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CVD-Grown Diamond with an Unusual Blue Band

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Checkered Pattern on Diamond

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Assembled Bead Cultured Half-Pearl

Investigation in the Carlsbad laboratory reveals a pearl submission is not mabe as initially believed.

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Wearable Art Jewelry Supporting Families in Guatemala

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Quarterly Crystal: Fluorite in Quartz from China

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Lepidolite in Copper-Bearing Tourmaline

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Kyanite in Quartz

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