Buying a GIA-Graded Diamond in Dearborn: What to Check

When shoppers say “GIA-certified diamond,” they usually mean a diamond accompanied by a GIA grading report. GIA evaluates and documents the diamond’s characteristics; it does not set the selling price, provide an insurance value, or guarantee that a particular diamond is the right purchase for you.

What a GIA report can tell you

• Whether the stone is a natural diamond and whether treatments were detected
• Shape, measurements, and carat weight
• Color and clarity grades
• Cut grade for eligible round brilliant diamonds
• Polish, symmetry, fluorescence, and identifying characteristics
• Report number and laser inscription information, when applicable

A report is only one part of the decision

Diamonds with similar grades can look different because of proportions, light performance, clarity-characteristic placement, and personal preference. Compare the actual diamonds, not only the paper. Ask to view the stone in different lighting and confirm that its report number and measurements match the documentation.

Natural and laboratory-grown diamonds

Both natural and laboratory-grown diamonds can have independent grading documentation, but the report should clearly identify the diamond’s origin and disclose relevant treatments. N.J. Diamonds carries GIA-graded natural diamonds and IGI-graded laboratory-grown diamonds so clients can compare options with documentation.

Grading report versus appraisal

A laboratory report describes the diamond. An appraisal describes the complete jewelry item and provides a value opinion for a stated purpose, such as insurance. One document does not automatically replace the other.

Get help reading the report

Serving Metro Detroit since 1996, N.J. Diamonds has an experienced diamond grader in-store to explain the report and show how its details relate to the diamond’s appearance and price. Learn more about diamond certification, review the 4Cs, use our diamond buying guide, or contact N.J. Diamonds for help comparing diamonds.