Mission, Staff & Governance
GIAの使命は、広く一般の信頼を確保することです。 GIAを主導するのは、理事会、幹部スタッフ、世界各地のラボやキャンパスのディレクターなどです。
CVD Diamond Over 34 Carats
Jewels of the Edwardians
Although the reign of King Edward VII of Great Britain was relatively short (1902-1910), the age that bears his name produced distinctive jewelry and ushered in several new designs and manufacturing techniques. During this period, women from the uppermost echelons of society wore a profusion of extravagant jewelry as a way of demonstrating their wealth and rank. The almost exclusive use of platinum, the greater use of pearls, and the steady supply of South African diamonds created a combination that will forever characterize Edwardian jewels. The Edwardian age, truly the last era of the ruling classes, ended dramatically with the onset of World War I.

Chart: Inclusions in Natural, Synthetic, and Treated Ruby
A Synthetic Diamond Overgrowth on a Natural Diamond
Cuprian Liddicoatite Tourmaline
GIA Education Available in Shenzhen, China
CARLSBAD, Calif. – Aug. 19, 2019 – Aspiring gem and jewelry professionals in Shenzhen, China will now have direct access to GIA education programs through Peking University Resource College.
Introducing the GIA Gemolite® NXT Microscope
Compare D-to-Z Diamond Grading Reports

GIA CEO Susan Jacques Honored by Jewelers Vigilance Committee
GIA Launches Updated Laboratory-Grown Diamond Services October 1
GIA will launch revised evaluation services for D-to-Z laboratory-grown diamonds on October 1
GIA’s 7thAnnual Jewelry Design Competition Celebrates Emerging Talent
Recognizing the outstanding talent of GIA jewelry design students from around the world globally
