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IGI Certificate – violetjewels

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IGI Certified Diamonds

An IGI certificate is a mark of trust—verifying every detail of
your diamond with expert precision.

Reviewed by professionals: Each piece is carefully checked for accuracy by qualified gemologists and specialists.

What Is IGI?

The International Gemological Institute (IGI) is a globally recognized diamond and gemstone grading organization established in 1975 in Antwerp, Belgium. As one of the world's largest independent gemological laboratories, IGI has built a solid reputation in the diamond industry over the past several decades. 

IGI maintains facilities in major diamond centers worldwide, including New York, Antwerp, Mumbai, Bangkok, and Hong Kong. The institute employs skilled gemologists who use state-of-the-art technology to evaluate diamonds and other gemstones according to internationally recognized standards. 

In addition to diamond grading, IGI offers educational programs covering various aspects of the jewelry industry, including jewelry design, diamond grading, and gemstone identification.

Sample information covered in an IGI Diamond Certification Report: 

  • Certification Date: The date the diamond was examined and certified by IGI 
  • Report Number: A unique identification number assigned to the specific diamond certificate 
  • Diamond Description: Indicates the type of diamond 
  • Shape and Cutting Style: Describes the geometric form and faceting pattern of the diamond 
  • Measurements: The physical dimensions of the diamond in millimeters, typically representing length x width x depth. 
  • Carat Weight: The mass of the diamond expressed in carats 
  • Color Grade: Rates the diamond's colorlessness on a scale typically ranging from D (colorless) to Z (light yellow or brown). 
  • Clarity Grade: Evaluates the presence of internal or external flaws (inclusions or blemishes) 
  • Polish: Rates the smoothness of the diamond's facet surfaces 
  • Symmetry: Evaluates how precisely the facets align with each other 
  • Fluorescence: Indicates how the diamond reacts under ultraviolet light 
  • Inscription: Notes any laser inscriptions on the diamond, which typically include the certificate number for identification purposes 
  • Comments: Additional information about the diamond that doesn't fit in other categories