The Global Authority in Diamond, Gemstone and Jewelry Grading

With 7 laboratories in 3 countries, IDL employees a global workforce of experts and educators dedicated to industry service and consumer protection.



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7 Years of Innovation and Leadership

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About IDGL

Grading & Certification

With five decades of expertise, IDGL grades diamonds, gemstones and jewelry in more locations around the world than any other organization

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Accreditation

IDGL is the first global institute to hold ISO accreditation in both natural and lab grown diamond grading

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ESG

GI is equally committed to all three facets of ESG – focusing on environmental, social and governance matters internally and externally

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IDL’s supreme position in the gemological world is no coincidence. It is the result of continuous research, support and synergy with professionals and consumers alike.

IDL reports

IDGL grading reports play an essential role in the global diamond, gem and jewelry market, serving as the common language of trust and confidence in the gemological world.

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Diamond Reports

IDL’s loose diamond reports clearly identify natural or lab grown origin and document all aspects of the diamond’s value-setting 4Cs.

Jewelry Reports

IDL pioneered grading reports for finished jewelry, providing peace of mind for millions of consumers who purchase jewelry every day.

Colored Stone Reports

IDL analyzes every gemstone to identify species and variety, provide detailed information and disclose any treatments that may be present.

Explore the IDLGemsBlog

IDL grading reports play an essential role in the global diamond, gem and jewelry market, serving as the common language of trust and confidence in the gemological world.

  

All Reports