How to read

GIA Diamond Report

Part 1

  • 1. Date

    Date diamond was examined by GIA.

  • 2. REPORT NUMBER

    Unique GIA report number registered in GIA’s extensive global database.

  • 3. SHAPE AND CUTTING STYLE

    The outline of the diamond (shape) and the pattern of the facet arrangement (cutting style).

  • 4. MEASUREMENTS

    Diamond dimensions listed as “minimum diameter – maximum diameter x depth” for round diamonds and “length x width x depth” for fancy-shaped diamonds.

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Part 2

  • 5. CARAT WEIGHT

    Weight given in carats, recorded to the nearest hundredth of a carat. One carat is equal to 1/5 of a gram.

  • 6. Color Grade

    The absence of color ranging from colorless to light yellow or brown when compared to GIA Master Color Comparison Diamonds. Graded on a D-to-Z scale. If “*” appears next to the color grade, a color treatment was detected.

  • 7. CLARITY GRADE

    The relative absence of inclusions and blemishes. Graded on a scale from Flawless to Included based on size, nature, number, position, and relief of characteristics visible under 10x magnification.

  • 8. CUT GRADE

    For standard, D-to-Z color, round brilliant diamonds. Cut grade incorporates the aspects of face-up appearance, design, and craftsmanship. Graded on a scale from Excellent to Poor.

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Part 3

  • 9. POLISH

    Smoothness of the Diamond’s surface, assessed on a scale ranging from Excellent to Poor.

  • 10. SYMMETRY

    Exactness of the diamond’s outline, and the shape, placement, and alignmentof its facets, assessed on a scale ranging from Excellent to Poor.

  • 11. FLUORESCENCE

    Strength and color of the diamond when viewed under long-wave ultraviolet light. A fluorescence description of “none” represents a range of fluorescence from Indiscernible to Very Faint. Used for identification purposes.

  • 12. INSCRIPTION (S)

    Any text, symbols, logos, or a unique GIA report number inscribed on the diamond’s girdle.

  • 13. COMMENTS

    Additional identifying characteristics or features that are not otherwise represented on the report. If a treatment is detected, such as laser drilling, it would be described here.

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Part 4

  • 14. PROPORTION DIAGRAM

    Graphic profile representation of the diamond’s actual proportions.

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Part 5

  • 15. PLOTTED DIAGRAM

    Approximates the shape and cuttingayle of the diamond. Symbols indicate the type or nature, position, and the approximate size of a clarity characteristic.

  • 16. KEY TO SYMBOLS

    Lists the characteristics and symbols shown on the plotting diagram, if present.

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Part 6

  • 17. GIA COLOR SCALE

    Illustrates the GIA Color grades and their relative positions in the GIA Diamond Color Grading System.

  • 18. GIA CLARITY SCALE

    Illustrates the GIA Clarity grades and their relative positions in the GIA Diamond Clarity Grading System.

  • 19. GIA CUT SCALE

    Illustrates the GIA Cut grades and their relative position in the GIA Diamond Cut Grading System. Available for standard round brilliant cut diamonds in the D-to-Z color range and Flawless-to-I3 clarity range.

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Part 7

  • 20. QR CODE

    A two-dimensional barcode that, when scanned, verifies data on the report against the GIA database.

  • 21. SECURITY FEATURES

    Microprinting, security screens, watermarks, a two-dimensional barcode, a hologram, and sheet numbering safeguard report integrity and facilitate document authentication.

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