The Big Seven – Global Pillars of Gemstone Certification
1. GIA – Gemological Institute of America
Founded: 1931
Headquarters: Carlsbad, California, USA
Website:
https://www.gia.edu
Specialty: Diamonds, Colored Diamonds, Pearls, Gem ID
Why It Matters:
- World\'s most recognized gemological institute
- Invented the 4Cs grading system (Cut, Color, Clarity, Carat)
- Primarily known for diamonds and pearls, but also issues basic reports for colored stones
- Massive global presence and educational reach
2. SSEF – Swiss Gemmological Institute
Founded: 1972
Headquarters: Basel, Switzerland
Website:
https://www.ssef.ch
Specialty: High-end colored gemstones (Emeralds, Rubies, Sapphires)
Why It Matters:
- Academic rigor, often considered the most scientific lab globally
- Preferred by auction houses and private collectors
- Performs origin determination, treatment analysis, and advanced research
3. GRS – GemResearch Swisslab
Founded: 1996
Headquarters: Meggen, Switzerland
Website:
https://www.gemresearch.ch
Specialty: Colored gemstone origin, enhancement reports
Why It Matters:
- Known for clarity in reports and photo documentation
- First to popularize terms like \"Pigeon\'s Blood\" and \"Royal Blue\"
- Excellent for trade confidence in rubies and sapphires
4. Gübelin Gem Lab
Founded: 1923
Headquarters: Lucerne, Switzerland
Website: https://
www.gubelingemlab.com
Specialty: Colored gemstones and inclusion studies
Why It Matters:
- Pioneers of \"microscopic fingerprinting\" to determine gem origin
- Scientific yet poetic reports used in global auctions
- Holds heritage prestige across Europe and Asia
5. AGL – American Gemological Laboratories
Founded: 1977
Headquarters: New York, USA
Website:
https://www.aglgemlab.com
Specialty: Colored gemstone grading, origin, and treatment reports
Why It Matters:
- First U.S. lab to specialize in colored stones
- Known for its \"Prestige Grading Reports\" with a numeric color/clarity scale
- Highly trusted in auction and collector circles
6. GIT – Gem and Jewelry Institute of Thailand
Founded: 1998
Headquarters: Bangkok, Thailand
Website:
https://www.git.or.th
Specialty: Southeast Asian rubies, sapphires, spinels
Why It Matters:
- Government-backed credibility
- Affordable reports for commercial use
- Local expertise in Thai, Burmese, and Cambodian gemstones
7.IGI – International gemmological institute
Authority in Diamonds and coloured gemstones .
Headquartered in Mumbai, Majority owned by Blackstone group.
website :
Www.igi.org
Speciality : Diamonds and Lab grown diamonds . Also issues basic reports for gems including origin report
Why It Matters:
-Mass reports for diamonds grading. Widely accepted in both Far east and western markets.
- Affordable reports for commercial use
- Local expertise in Natural and lab grown diamonds.
Other Globally Noted Labs
| Lab | Location | Specialty | Website |
|------------------|------------------|------------------------------------------|----------------------------------------|
| Lotus Gemology | Bangkok, Thailand| Ruby & sapphire treatment + origin |
https://www.lotusgemology.com |
| C. Dunaigre | Switzerland | Boutique reports, emeralds & rubies |
https://www.cdgemlab.com |
| AIGS | Bangkok, Thailand| Thai-origin stones + gem education |
https://www.aigsthailand.com |
| ICA GemLab | Bangkok, Thailand| Colored stone grading by ICA |
https://www.icagemlab.com |
| Guild Gem Lab | Thailand & USA | Gemstone ID, origin, treatment |
https://www.guildgemlab.com |
| Bellerophon | Bangkok, Thailand| Boutique colored gem certification |
https://www.bellerophongemlab.com |
Precious Carats Promise
We offer select gemstones certified by one or more of the above global labs. Ask for lab upgrades before purchase. We will never misrepresent a treated gem as natural. Ever.
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