For more than 50 years, fine jewelers everywhere have considered the GIA Diamond Grading Report the premier credential of a diamond’s authenticity and quality.

GIA Diamond Grading Report

The GIA Diamond Grading Report includes an assessment of a diamond’s 4Cs – color, clarity, cut, and carat weight – along with a plotted diagram of its clarity characteristics and a graphic representation of the diamond’s proportions. For standard round brilliant cut diamonds falling in the D-to-Z color range, the report also includes a GIA Cut grade.

The GIA laboratory issues diamond grading reports for loose, natural diamonds in the D-to-Z color range that weigh 0.15 carats or more. GIA Diamond Grading Reports are not issued for laboratory-grown diamonds, diamond simulants, mounted diamonds or those that have undergone unstable treatments, such as fracture filling or coating. And while reports may be issued for diamonds that have been laser drilled or HPHT processed, reports will indicate that the diamond has been treated.

A GIA Diamond Grading Report includes an assessment of the 4Cs – Color, Clarity, Cut and Carat Weight – along with a plotted diagram of its clarity characteristics and a graphic representation of the diamond’s proportions. The report also includes the official GIA grading scales for Color, Clarity and Cut as reference tools.

Download How to Read a GIA Diamond Grading Report

New! GIA Diamond Origin Report

The new GIA Diamond Origin Report contains all the unbiased, accurate data of a Diamond Grading Report, plus GIA’s scientific determination of the diamond’s country of origin and a microscopic laser inscription of the report number on the diamond’s girdle. Image-rich, interactive materials accompany the report, telling the story of the diamond’s home country and the diamond’s journey from rough to polished state.  Explore the GIA Diamond Origin Report.