EGI As Gemological Institute

By its nature, the global diamond trade is dynamic, with orders being quickly filled and supplied. Members of the business move quickly, knowing that fast turnarounds, superior levels of grading and service are vital to winning and retaining business.

Around the world, EGI certificates bring confidence when buying or selling diamonds, gemstones and jewelry. Total commitment to understanding consumer concerns has motivated EGI to develop comprehensive analysis and clear documentation for consumers. This empowers jewelry buyers to focus on finding precisely what they want, with full assurance in the integrity and quality of the EGI certification.

EGI is a standard of excellence for industry professionals and consumers around the globe.

International Standards

The diamond's quality, and therefore its value, is set by what are called the 4Cs. These relate to: carat, color, clarity and cut which decide the price of the gem.


  • Carat - Diamonds are weighed in carats, with 1 carat equaling 0.2 grams.
  • Color - Diamonds come in a wide range of colors, ranging from colorless to yellow.
  • Cut - Determines how light entering the stone will react and how much light return.
  • Clarity - Refers to the purity of the diamonds or to the degree that it is free of inclusions.

Proving Your Diamond's Character

Since 1982, EGI has demonstrated its expertise in gemology and diamond certification using the most updated technology and laboratory equipment.

We evaluate your diamonds and precious stones with the highest standards of precision in gathering all the required data for certification. The internationally recognized EGI Report is your diamond’s DNA.

EGI Exclusive Services

Diamond Report

The EGI Diamond Certificate provides a reliable and accurate documentation of a diamond’s identity and grade based on the internationally recognized diamond grading system.

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Jewelry Report

The EGI Jewelry certificate is used to document jewelry pieces and identify the characteristics of the precious stones featured in each piece.

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Colored Gemstone Report

EGI Laboratories are equipped with the most technologically advanced equipment available for the use in the identification and authentication of colored gemstones.

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