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 a specific diamonds characteristics. When purchasing a diamond with a certificate, buyers need 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.

Who issues Diamond Grading Reports?
There are numerous gemological laboratories that provide diamond certification services. Despite this there are only a few laboratories that have achieved a truly international recognition for grading, based on their consistency, high grading criteria and expertise. Diamondcelebrations.com has been careful to only provide its customers with diamonds that have been graded by these gemological laboratories, including the AGSL (American Gem Society Laboratory), HRD (Antwerp Diamond High Council) and GIA (Gemological Institute of America).

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 - for example 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.
  • Table is a reference to the proportion of the table (top flat part of the diamond) relative to the diamonds 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 refer 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 on the clarity grading scale.
• Colour - the measure of clarity in a diamond measured from D - Z on the colour grading scale.
• Fluorescence - a diamond's reaction to exposure of UV radiation.
• Plot - an illustrative representation of the diamond's imperfections.