- Gemological Institute Of America | All About Gemstones - GIA
Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services
- 美国宝石研究院 | 宝石大全 - GIA
GIA 成立于 1931 年，是一家独立的非盈利机构，通过研究、教育和鉴定所服务来保护购买宝石和珠宝的大众。
- Natural Diamonds | Diamond Stone – GIA C
Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA
- 首頁 - Gemological Institute of America
我們採用最新的研究、技術和久經考驗的技能進行教學，同時把專業誠信的重要性灌輸給學生。 GIA 證書是知識和信任的象徵，是全球最為卓越的真正標誌。
- Programs Courses - GIA
GIA’s diverse course offerings will help prepare you with the knowledge and skills needed by industry employers today From gemology to jewelry manufacturing arts to bench jewelry, the courses we offer give students practical, in-depth, on-the-job skills and knowledge
- Fall 2025 Gems Gemology | The Quarterly Journal of the . . . - GIA
Examines correlations between surface microstructures and the orange peel effect in Russian white nephrite, proposing a formation model and revealing distinctive microfeatures specific to the material Read More View All Articles In This Issue Regular Features Lab Notes The latest advances and findings from GIA laboratories View All (8)
- How to Submit a Gem - GIA
The GIA Memo Creator makes it easier than ever to submit your gems to GIA for grading and analysis The GIA Memo Creator connects directly to your client portal account, so your information is automatically stored, reducing the amount of information needed to complete each memo
- GIA - Report Check
GIA reports represent the highest standard of reliability, consistency and integrity And now, GIA Report Check is available for all GIA reports, providing you with an additional level of assurance
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