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The Essentials of Diamonds With Grading Reports

diamond grading report

Discover answers to frequently asked questions and sales tips for this valuable option.

What is the most valuable asset in the jewelry industry? I’ll give you a hint. It doesn’t sparkle and it can’t even be bought. The answer is trust and reliability. Given today’s competitive retail landscape, this is paramount for jewelers looking to build lasting relationships with customers. 


As purveyors and sellers of precious stones and beautiful jewelry that can carry a lot of significance, offering products that come with a guarantee of quality is a necessity. One of the most effective ways to do this is by selling diamonds with a grading report. 

diamond grading report

Diamonds With Grading Reports: Frequently Asked Questions

Perhaps you’re already familiar with grading reports, or this may be the first chance you have had to dive into the topic. Either way, we are here to offer a look at the essentials you need to know by answering frequently asked questions. 

1. What is a diamond grading report and what is included with one?

A diamond grading report is a document issued by an independent gemological laboratory that provides an expert assessment of a diamond’s characteristics, including its 4Cs (cut, clarity, color, and carat weight), as well as other relevant details — such as measurements and proportions, finish, fluorescence, a plotting map of the clarity characteristics, additional comments, and more.

2. Why does a diamond grading report matter? Why should I sell a diamond with a grading report to my customers?

A diamond grading report matters because it offers transparency and credibility. It assures customers that the diamond they are purchasing has been evaluated by unbiased professionals, giving them confidence in their investment. Additionally, for those customers wishing to insure their diamond purchase, many insurance companies will require a grading report or some form of appraisal before issuing a policy. 

3. Are diamond grading reports transferrable to customers?

Yes, diamond grading reports are transferrable to your customers and serve as valuable documentation of the diamond’s characteristics, making it easier for future owners of the diamond to assess its value. This is particularly useful for any diamond someone expects to be an heirloom. 

4. Who provides diamond grading reports?

There are several reputable gemological laboratories throughout the world that provide diamond grading reports. Stuller offers diamonds with grading reports from some of the most well-known labs, including the Gemological Institute of America® (GIA), European Gemological Laboratory USA (EGL USA), International Gemological Institute (IGI), and Gem Certification and Assurance Lab by Sarine (GCAL). 

5. Do diamond grading reports show whether the diamond is natural or lab-grown?

Yes, labs clearly notate whether a diamond is natural or lab-grown on the report. The labs are obligated to make sure the visual look of their lab-grown diamond reports is different from the natural diamond reports so there is very little chance of the two being confused. On the lab-grown diamond reports that Stuller carries, you can also find information on its method of growth (HPHT or CVD).

6. Can any diamond receive a grading report?

Most large diamonds can receive a grading report. Each lab will have slight variations in what size they begin offering reports. This includes natural and lab-grown diamonds as well as fancy-color and colorless diamonds.

selling diamond grading reports

Tips for Selling Diamonds With Grading Reports

A grading report provides significant value to the diamond, but that also affects the price. Customers will want to know why they should choose the diamond with a grading report as opposed to the diamond without one. Try these tips to help your customer find the diamond that suits their needs.

Understand Your Customer’s Intentions

Not every diamond purchase calls for a grading report. When thinking about what a diamond with a grading report is used for, think of engagement ring center stones, statement necklace center stones, or heirloom diamond earrings. The grading report will provide that added level of certainty and peace of mind when they can insure the diamond with extra confidence.

Relay the Features and Benefits

Educate your customer. Help them understand the advantages of purchasing a diamond with a grading report, emphasizing the transparency and credibility it provides. 

Tell the Story

Incorporate storytelling into your sales pitch, highlighting the journey and craftsmanship behind each diamond. By adding a touch of romance, you can elevate the buying experience and strengthen the emotional connection to the product.

Stuller Diamonds®: Exploring Options With Grading Reports

When it comes to securing your diamonds through Stuller, there are two things you can always count on. First, we offer a vast range of options when it comes to the variety in shape, size, and quality of our diamonds. Truly, you’ll be able to find a diamond for anyone. Second, our large assortment is in stock, so you can have what you need with immediate fulfillment and rapid delivery. Explore every possibility in both our natural diamond and lab-grown diamond selections.

known origin diamonds canadamark

CanadaMark® Diamonds

Go one step further with your natural diamonds with reports by offering CanadaMark Diamonds — diamonds with known origin. CanadaMark Diamonds are natural, unenhanced diamonds mined in a remote region near the Arctic Circle and are tracked through audited processes from origin to market. 

lab-grown diamond grading report

GCAL 8X® Ultimate Cut Grade Lab-Grown Diamonds

Offer the highest quality achievable in lab-grown diamonds with certificates through GCAL 8X Lab-Grown Diamonds. These diamonds achieve the highest precision in their cutting grade, recognized for their exemplary brilliance and beauty. They are certified physically and optically excellent in eight critical factors of cut quality. 

Ignite Growth With Authenticity and Credibility

In an industry built on trust and emotion, diamond grading reports serve as invaluable tools for jewelers seeking to uphold the highest standards of integrity and transparency. By offering diamonds accompanied by comprehensive grading reports, jewelers can instill confidence in their customers and forge enduring relationships based on trust and reliability.


Heather Fontenot

Senior Director, Diamonds & Gemstones

Heather joined the Stuller loose stone merchandising team in August 2015 after attaining her bachelor's degree in Business Management from the University of Louisiana at Lafayette. Her natural curiosity and love of all things that sparkle and shine has pushed her to learn as much as she can about Earth's most precious possessions.