Gemological Institute of America1d
A Study of the General Electric Synthetic Jadeite
The gemological properties of synthetic green and lavender jadeite, which has been manufactured by the General Electric Company on an experimental basis, are summarized. The synthetic jadeites ...
Gemological Institute of America5d
The GIA Diamond Origin Report: Diamond Traceability Based on Science
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 ...
Gemological Institute of America8d
Thailand Gems and Jewelry Fair 2023
Visit GIA at Thailand Gems & Jewelry Fair to discover how we’re unfolding a digital future. At our Show Service Laboratory, GIA will offer quick, convenient gem identification and origin ...
Gemological Institute of America1mon
Visit to Tanzania and Kenya marks 17 years of rigorous scientific study
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 ...
Gemological Institute of America23d
Analysis of Gemstones at GIA Laboratories
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 ...
Gemological Institute of America23d
Metrology at GIA
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 ...
Gemological Institute of America1d
GIAとAGSは、9月7日から10日までカールスバッドで開催される変革的なイベントのために団結します。
すべてのGIA拠点でご利用可能。 マラウイ産のブルージルコンが報告される マラウイで新たにブルージルコンの産出が報告されました。研磨すれば美しい宝石となる原石を宝石取引市場に ...
Gemological Institute of America1d
アメジスト: 魅惑的な紫とスミレ
すべてのGIA拠点でご利用可能。 マラウイ産のブルージルコンが報告される マラウイで新たにブルージルコンの産出が報告されました。研磨すれば美しい宝石となる原石を宝石取引市場に ...
Gemological Institute of America1d
宝石学およびジュエリー芸術コースのための奨学金
すべてのGIA拠点でご利用可能。 マラウイ産のブルージルコンが報告される マラウイで新たにブルージルコンの産出が報告されました。研磨すれば美しい宝石となる原石を宝石取引市場に ...
Gemological Institute of America11y
Opal Care and Cleaning Guide
Opal can range from 5 to 6.5 on the Mohs hardness scale. Hardness and toughness Gem and mineral hardness is measured on the Mohs scale. The numbers are based on the relative ease or difficulty with ...
Gemological Institute of America6y
Career Preparation
GIA is more than a place to grow academically. You’ll enjoy a professional affiliation with the institute throughout your career. To help you succeed, GIA staff members provide career advice and ...
Gemological Institute of America11y
Emerald Quality Factors
This 5.30-carat emerald from Brazil has a slightly bluish green color. Courtesy John Parrish, courtesy African, Brazilian, Colombian Gems Incorporated. Emerald has many special qualities, but colored ...