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Diamond Grading Reports: Learn with the Diamond Registry

Diamond Grading Reports: Learn with the Diamond Registry

What is a Diamond Grading Report?

A diamond grading report or certificate is a certificate issued by an independent gemological laboratory attesting to the characteristics of a specific diamond. Diamond Grading Reports confirm that a specific diamond has been examined by trained and experienced diamond graders who, using gemological instruments, have determined that the diamond contains the characteristics as stated in the certificate.

Why Use a Diamond Grading Report?

Diamond Grading Reports have incredible value in providing buyers with an unbiased, professional evaluation of the characteristics of a specific diamond. When purchasing a diamond with a certificate, buyers need to take the risk of relying on their own "naked-eye" examination of the diamond and paying a price that does not relate to the actual value of that diamond. Each Diamond Grading Report is allocated an exclusive number that corresponds to a specific diamond. In addition, most Diamond Grading Reports will include diagrams illustrating inclusions unique to that specific diamond, providing further proof of certification.

What Does A Diamond Grading Report Tell Us About A Specific Diamond?

As a diamond's "blueprint" a Diamond Grading Report provides extensive information on the diamond's precise characteristics, typically including the following:

  • Diamond shape - of or example, emerald, round, square, pear, oval.
  • Measurements- of the diamond's diameter.
  • Weight - weight is rounded to one-hundredth of a carat. One carat is the equivalent of 1/5 of a gram.
  • Proportions - depth percentage and table percentage are measured.
    • Depth is a reference to the percent of the depth of the diamond, measured from table to culet, relative to the width of the diamond.
    • The table is a reference to the proportion of the table (top flat part of the diamond) relative to the diamond's average width Girdle - reference to the thickness of the dividing line between the top and bottom parts of the diamond.
  • Culet - indicating the presence of the pointed part at the bottom of the diamond.
  • Polish and Symmetry
    • Polish refers to the quality of the polish of the facets
    • Symmetry refers to the extent of precision that the facets have been aligned with each other.
  • Clarity - internal and external clarity of the diamond measured from IF - I3
  • Color - the measure of clarity in a diamond measured from D - Z.
  • Fluorescence - a diamond's reaction to exposure to UV radiation.
  • Plot - an illustrative representation of the diamond's imperfections.
Jewelry
Color range: i
  • D Color
  • E Color
  • F Color
  • G Color
  • I Color
  • J Color
  • K Color
  • D Color
  • E Color
  • F Color
  • G Color
  • I Color
  • J Color
  • K Color
Clarity: i
  • I.F.
  • VVS1
  • VVS2
  • VS1
  • VS2
  • SI1
  • SI2
  • I.F.
  • VVS1
  • VVS2
  • VS1
  • VS2
  • SI1
  • SI2
Color: Color i
Color intensity:  Faint - Fancy i
  • Faint
  • Faint
  • Very Light
  • Light
  • Fancy Light
  • Fancy
  • Fancy Intense
  • Fancy Vivid
  • Fancy Deep
  • Faint
  • Faint
  • Very Light
  • Light
  • Fancy Light
  • Fancy
  • Fancy Intense
  • Fancy Vivid
  • Fancy Deep
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Weight (carat):  1 carat
  • 1
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Shape: i
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