Grading Reports

GSI offers several grading reports to meet client needs for different levels of format, detail and price.  Each report includes educational materials to help consumers understand the information in the context of personal jewelry and diamond purchases.

All GSI Reports include:

  • A Guide to Understanding Your GSI ReportClick here to read it interactively
  • How to Take Great Care of Your Gems and Jewelry
  • Information about our Virtual Vault for U.S. customers
  • Terms & Conditions

Please note that all GSI Reports can be customized to meet specific client needs.

  1. The Full Diamond Examination Report (FDX Report) is an 8.5″ x 11″ document, summarizing GSI’s most comprehensive service for identifying and grading an individual gemstone or piece of jewelry, including materials and side stones.  Click here to access Understanding Your FDX Report, a concise explanation of all terms used in the report, written in consumer-friendly language.

    In addition to documenting many details, FDX includes plotting diagrams, showing internal inclusions and external blemishes. Our customers have several options for customizing the format and contents of their FDX Report to their needs. For example, some reports contain a photo of the stone or jewelry items, as well a diagram. Others may include a gemstone profile with dimensions.

    Click here to see the inside back cover, with an interactive version of our Guide to Understanding the Report.

  2. The Intermediate Diamond Examination Report (IDX Report) is a more compact report that may include a photo or diagram, and may also be modified and customized to meet specific customer needs.

    View a sample IDX Report.

  3. The Modified Diamond Examination Report (MDX Report), is a convenient credit-card-sized document containing basic information about a gemstone.

    View a sample MDX Report.

  4. Trade Consultation ReportThis compact folding report, designed for trade use, includes the plotting diagram and basic gemstone information.
  5. Hearts and Arrows ReportThe Hearts and Arrows concept began in Japan in the 1980’s. To achieve a repeatable and gradable hearts and arrows pattern, the diamond should be cut to very precise proportions. The most important factor is the cut. which produces symmetrical hearts and arrows.Our Hearts and Arrows grading report documents that the cut quality and gem dimensions meet these exacting standards.
  6. Light Performance PSX ReportOn one convenient report, integrated with the 4C’s, GSI provides a total view of each diamond’s most important characteristics including cut, clarity, color, carat weight and all five light performance properties:
    1. Brilliance…the intensity of the reflection of white light from the diamond’s surface to the eye.
    2. Fire…the amount of color that a diamond returns to the eye, including intensity and dispersion.
    3. Scintillation…the diamond’s property of flashing splashes of moving light across its surface.
    4. Contrast effect…the intensity variation between light and dark areas across the diamond’s surface.
    5. Efficiency…the portion of a diamond’s surface that reflects light back to the eye.