Consumers now, more than ever, have a heightened awareness of sustainably and ethically sourced products. The GIA Diamond Origin Report uses scientific evaluation to provide confirmation of a ...

With decades of expertise and laboratory locations worldwide, GIA uses more advanced instrumentation that extends far beyond the boundaries of standard gemological testing. The comprehensive analysis ...

Metrology, the science of measurement and its application, plays a critical role in the accuracy of GIA’s research and laboratory services. The metrology team closely monitors the performance of ...

CARLSBAD, Calif. – January 29, 2025 – GIA field gemologists recently completed their one-hundredth expedition, adding to the Institute’s unrivaled store of independently verified gemological ...

As a consumer, you will regularly encounter in the marketplace gems that have been treated to change their appearance. A topic that often comes up is whether a particular gemstone is or isn’t treated.

The beautiful shimmer of light that's characteristic of moonstone is apparent even in its rough form. This special property is maximized by a quality cut. - David Humphrey Moonstone’s delicate beauty ...

The Graduate Jeweler diploma program is a hands-on experience that introduces students to the knowledge and skills required for a career in jewelry fabrication and repair. You will work with gemstones ...

Useful contact information if you’re looking for a professional to value your gem or jewelry item. GIA does not provide an appraised value for gemstones or jewelry. This service should be performed by ...

Fancy color diamonds are among the rarest and most valuable gemstones. Diamonds in the normal color range are colorless through light yellow and are described using the industry’s D-to-Z color-grading ...

2021年Gianmaria Buccellati財団 最優秀ジュエリーデザイン賞を受賞したデザイン。カリフォルニア州カールスバッドでGIAジュエリー デザイン コースを修了したMeghan Simmonsによる作品。この ...

No matter where you are in the world, you can submit diamonds, colored stones and pearls directly to any GIA laboratory location and be assured of consistent quality and service. On-site services at ...

研究宝石学家 Shmulik Polnauer（舒姆里克·保罗纳尔）正在欣赏 1.68 克拉的 Prosperity Pink diamond（幸运粉红）。 在过去五年中，Polnauer（保罗纳尔）共从 Rio Tinto（力拓公司）的 Argyle Pink Diamond Tender ...