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What is a Diamond Grading Report?

Updated on May 27, 2024

With over 40 years of expertise, Diamond Registry’s CEO and owner, Nissan Perla, is your trusted guide in the diamond-buying world. Recognized by prestigious publications like The Washington Post and Chicago Tribune, Nissan’s extensive knowledge and experience in evaluating, buying, and selling diamonds are unparalleled. Our commitment to integrity, transparency, and delivering exceptional value ensures that you make an informed decision when acquiring your timeless treasure. Choose Diamond Registry for personalized guidance, education, and a curated selection of the finest quality diamonds, backed by decades of industry expertise and dedication to your satisfaction.

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Diamond Grading Reports: Learn with the Diamond Registry

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.

What makes us your trusted partner

With over 40 years of expertise, Diamond Registry’s CEO and owner, Nissan Perla, is your trusted guide in the diamond-buying world. Recognized by prestigious publications like The Washington Post and Chicago Tribune, Nissan’s extensive knowledge and experience in evaluating, buying, and selling diamonds are unparalleled. Our commitment to integrity, transparency, and delivering exceptional value ensures that you make an informed decision when acquiring your timeless treasure. Choose Diamond Registry for personalized guidance, education, and a curated selection of the finest quality diamonds, backed by decades of industry expertise and dedication to your satisfaction.

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.

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Client Reviews

Rebecca Schott
Rebecca Schott
Nissan, David and his team were extremely accommodating, understanding and patient with our purchase. They took the upmost care to find the best solution for our needs and went above and beyond normal ‘customer service’ standards. I have absolutely no qualms recommending their products and services. Both were absolutely flawless. I will continue to sing them praises and will most definitely purchase from them again in the future. Thank you again!
Gershom Menachem
Gershom Menachem
Great team of diamond experts who show personal care for the client’s needs and aftersales service. They really go the extra mile to make it happen no matter the challenges ahead. Rush orders, international shipping, upgrade service, jewelry repair, large diamonds, small items, precious stones. Very honest and open information to the clients. You will feel like talking to a friend.
Thom P.
Thom P.
Bought a beautiful stone here for an engagement ring. I was a little apprehensive since you’re buying something unseen. But Cid made it easy. In fact, Nissan, the owner also gave a call to make me more comfortable. They sent me the stone to take to a local jeweler with only my Amex in case I bailed on them.

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