- The Glenn and Martha Vargas Gem and Mineral Collection (UT Austin)
- Mineralogical Society of America (MSA)
- Mineralogical Association of Canada (MAC)
- Gemological Institute of America (GIA)
- American Gem Society (AGS)
- American Gem Trade Association (AGTA)
- Canadian Institute of Gemmology
- The Gemmological Association and Gem Testing Laboratory of Great Britain
- Scottish Gemmological Association
- Gemmological Association of Australia
- German Gemmological Association
- Swiss Gemmological Institute (SSEF)
- International Colored Gemstone Association
- American Society of Appraisers
- International Gemological Institute
- Jewelers of America
- The Mineralogical Record
- University of Nantes Diploma in Gemology
- Lotus Gemology
- The Image Gem Gallery
- Minerals Database (Mindat.org)
- Gill's Historical Index To Gems And Jewelry Online
Messages | Syllabus | Objectives | Schedule | Project | Old Exams | Gem Notes | Handouts | Bibliography | Links