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Diamond Information

  Every diamond is unique. Each reflects the story of its arduous journey from deep inside the earth to a cherished object of adornment. Yet all diamonds share certain features that allow us to compare and evaluate them.

These features are called the 4Cs.

 

 

 

Cut

 

Color

 

Clarity

 

Carat

 

 

 

 

 

 

What are the most reputable certification systems in the United States and around the world, and how are they different from each other?

Several well-known grading agencies in the United States and Europe have high reputations:

  • Gemological Institute of America (GIA)
  • American Gemological Society (AGS)
  • European Gemological Laboratory (EGL)
  • Diamond High Council (HRD, which is an abbreviation of the Dutch ďHoge Raad voor DiamantĒ)
  • International Gemological Institute (IGI)
  • International Confederation of Jewelry, Silverware, Diamonds, Pearls, and Stones (CIBJO)

 

 

Whatís the difference between certification and appraisal?

A diamondís certification is a scientific review of the rockís qualities: color, cut, clarity, and carat weight. It pertains to a loose diamond but will accompany the diamond even after a setting has been added. Certifications are conducted by several reputable groups. Certification does not assign a monetary value to a stone; it assigns grades on the diamondís key qualities.

An appraisal assigns a monetary value to a stone. Appraisals on loose stones are more accurate than appraisals on mounted diamonds, since flaws are less likely to be hidden. The appraisal of a diamond can vary, depending on who is conducting the appraisal, how, why, and when. An appraisal can be rendered useless by fluctuating market conditions, but a diamondís certification is more steadfast. If a certified diamond has been mounted on a ring, it may need to be recertified to make sure normal everyday activity did not deteriorate the clarity of the stone by chipping or scratching the surface. Also, certain ring settings involve cutting into the stone or pounding on it, and recertification will provide an up-to-date evaluation.