（GIA は、2024年に、グラジュエート・ジュエラー・ディプロマ・プログラムをリニューアルして開始します。

CARLSBAD, Calif. – Sept. 5, 2019 – GIA released a software upgrade on Sept. 4 for the industry-leading GIA iD100® gem testing device, giving the instrument the ability to distinguish natural pink diamonds from laboratory-grown (HPHT and CVD) diamonds and diamond simulants.

Join us at the Bangkok Gems & Jewelry Fair to explore a diverse range of gemstones, jewelry and industry solutions from leading Thai and international suppliers. Discover tools, components, and machinery for the trade, and attend GIA seminars on pearls and colored stone origin determination.

Sarah Habib

特別な対応

Simon Gouzy

Young students anywhere in the world can now experience the wonder of gems and minerals with GemKit™ by GemKids®, an online treasure trove of information and activities from GIA®, the Gemological Institute of America, the 90-year-old global leader in gem and jewelry education.

CARLSBAD, Calif. – March 28, 2019 – On April 30, GIA will introduce the GIA Diamond Origin Report service which will confirm the country of origin of polished diamonds.

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