When you purchase diamonds from Adiamor, they come with their original certificate, also known as a Diamond Grading Report or Diamond Dossier®. Additionally, Adiamor offers free appraisals for engagement rings, Design Your Own rings, and gemstone jewelry valued over $1000.
What is a Diamond Certificate?
A diamond certificate, issued by an independent third-party laboratory, confirms a diamond's authenticity and evaluates its characteristics. It provides a detailed description of the diamond's quality, covering its shape, weight, color, clarity, fluorescence, measurements, proportions, and overall finish.
Certification and Diamond Grading Laboratories
At Adiamor, we exclusively sell loose diamonds that have been thoroughly analyzed and graded by leading industry laboratories. These include the Gemological Institute of America (GIA), the International Gemological Institute (IGI), and the Gem Certification & Assurance Lab (GCAL). Each of these labs is known for its stringent, impartial grading standards. Rest assured, when you buy a diamond from us, it's of top quality and value.
View Diamond Certificates While You Shop
Browse our selection online and view certificates for many of the diamonds we offer. If a certificate isn't available for a specific diamond you're interested in, feel free to reach out to our expert support staff.
GIA
The Gemological Institute of America (GIA) stands as the foremost authority in diamond evaluation, having pioneered the concept of the four Cs: carat, cut, color, and clarity. A GIA certificate offers comprehensive insights into these characteristics, alongside details on polish, symmetry, fluorescence, and proportions. Additionally, each GIA certificate includes a distinct serial number for easy verification on the GIA website.
Sample GIA Diamond Grading Report
Laser Inscription Registry
Each diamond with a GIA Diamond Dossier is laser inscribed with the report number.
View Sample Inscription
Shape and Cutting Style
The diamond shape and cutting style.
Measurements
The diamond dimensions in millimeters.
Carat Weight
Weight of diamond listed to the nearest hundredth of a carat.
Color Grade
Color grade of the diamond.
Clarity Grade
Clarity grade determined under 10x magnification.
Cut Grade
Cut grade of the diamond.
Depth
Depth (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Table
Table facet (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Girdle
Range of girdle thickness.
Culet
Appearance of the culet facet.
Finish
Grades of polish and symmetry.
Fluorescence
Color, and strength of color when diamond is viewed under UV light.
Clarity Plot
A map of the approximate size, type, and position of inclusions as viewed under a microscope.
Comments
Description of additional diamond characteristics not mentioned in the report.
Sample GIA Diamond Dossier Grading Report
Laser Inscription Registry
Each diamond with a GIA Diamond Dossier is laser inscribed with the report number.
View Sample Inscription
Shape and Cutting Style
The diamond shape and cutting style.
Measurements
The diamond dimensions in millimeters.
Carat Weight
Weight of diamond listed to the nearest hundredth of a carat.
Color Grade
Color grade of the diamond.
Clarity Grade
Clarity grade determined under 10x magnification.
Cut Grade
Cut grade of the diamond.
Depth
Depth (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Table
Table facet (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Girdle
Range of girdle thickness.
Culet
Appearance of the culet facet.
Finish
Grades of polish and symmetry.
Fluorescence
Color, and strength of color when diamond is viewed under UV light.
Clarity Characteristics
Description of additional diamond characteristics not mentioned in the report.
GCAL
The Gem Certification & Assurance Lab (GCAL) is a leading research laboratory specializing in guaranteed diamond grading. Their consumer grading guarantee ensures cash-back for any identification or grading errors. GCAL provides a unique optical fingerprint for each diamond, along with 360°, fire, and scintillation videos. A GCAL certificate offers details on the four Cs of diamond grading, light performance, optical brilliance, and Hearts & Arrows. Additionally, each GCAL certificate includes a unique serial number for convenient verification on the GCAL website.
Sample GCAL Diamond Grading Report
Cut Grade
Cut grade of the diamond.
Shape
The diamond shape and cutting style.
Measurements
The diamond dimensions in millimeters.
Hearts & Arrows
The pattern of facets in round brilliant cut diamonds.
Brilliance
The overall amount of light returned to the person viewing the diamond.
Symmetry
Symmetry grade of the diamond.
Polish
Polish grade of the diamond.
Depth
Depth (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Table
Table facet (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Girdle
Range of girdle thickness.
Culet
Appearance of the culet facet.
Color Grade
Color grade of the diamond.
Clarity Grade
Clarity grade determined under 10x magnification.
GCAL 8X
The 8X certificate is a pioneering standard designed to identify diamonds of unparalleled cut quality. This innovative certification evaluates eight crucial aspects of cut quality, including polish, symmetry, proportions, brilliance, fire, scintillation, optical symmetry, and Hearts & Arrows.
Sample GCAL 8X Grading Report
Cut Grade
Cut grade of the diamond.
Shape
The diamond shape and cutting style.
Measurements
The diamond dimensions in millimeters.
Hearts & Arrows
The pattern of facets in round brilliant cut diamonds.
Brilliance
The overall amount of light returned to the person viewing the diamond.
Symmetry
Symmetry grade of the diamond.
Polish
Polish grade of the diamond.
Depth
Depth (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Table
Table facet (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Girdle
Range of girdle thickness.
Culet
Appearance of the culet facet.
Color Grade
Color grade of the diamond.
Clarity Grade
Clarity grade determined under 10x magnification.
IGI
The International Gemological Institute (IGI) boasts the largest global presence, with 20 laboratory locations worldwide. Their gemologists, certified by the GIA, utilize identical equipment and techniques for diamond grading. An IGI certificate offers insights into the four Cs of diamond grading, along with details on polish, symmetry, fluorescence, and proportions. Additionally, each IGI certificate includes a unique serial number for convenient verification on the IGI website.
Sample IGI Diamond Grading Report
Shape and Cut
The diamond shape and cutting style.
Carat weight
The weight of the diamond.
Color Grade
Color grade of the diamond.
Clarity Grade
Clarity grade determined under 10x magnification.
Cut Grade
Cut grade of the diamond.
Polish
Polish grade of the diamond.
Symmetry
Symmetry grade of the diamond.
Measurements
The diamond dimensions in millimeters.
Table Size
Table facet (for round diamonds) and/or width (for fancy shapes) relative to diameter.
Girdle
Range of girdle thickness.
Culet
Appearance of the culet facet.
Appraisal and Certification Documents
An appraisal is a crucial document indicating the approximate retail replacement value of an item, often required for insurance purposes. In the unfortunate event of loss, theft, or damage, your insurance provider relies on the appraisal to ensure equal replacement of your item. Furthermore, your insurance premium is determined based on the retail replacement value outlined in the appraisal. At Adiamor, we offer complimentary professional appraisals upon request for all diamond engagement ring purchases.
What's in our Appraisal?
Our appraisals, drafted and signed by our team of Gemology experts, guarantee the utmost quality of your purchase. Each center stone undergoes meticulous magnification inspection to align with its accompanying laboratory certificate. Sidestones also undergo thorough examination to meet Adiamor's stringent standards for excellence. In addition, our appraisal for diamond engagement rings contain valuable information, including:
- The precious metal used in the engagement setting.
- An accurate and complete description of the item being appraised.
- The shape, carat weight, color, clarity, and measurements of the center diamond.
- The name of the independent laboratory certification and report number.
- The approximate retail replacement value. If you have any further questions about the appraisal report, please email us at service@adiamor.com or contact a customer service representative by phone at 1-877-627-5094.