A champagne diamond's color lives on its GIA report, and that report is not one document. GIA issues five report types on the D-to-Z scale and three for colored diamonds, and which one a stone carries decides what you can read before you buy. The grade itself is determined the same way throughout. What moves between report types is the supporting detail: the plotted clarity diagram, the list of clarity characteristics, the finish grades, fluorescence, an inscription, and in one case the clarity grade itself.
That matters more on a warm stone than on a near-colorless one, because the brown wording is part of the color grade rather than a separate field. On the D-to-Z side it is a notation beside the letter — K Faint Brown, N Very Light Brown — and what faint brown means covers how that notation behaves. On the colored-diamond side the grade is written out, as in Fancy Brown, and there is no letter at all. Either way the color line is the entire product description, so the first question about any listing is which report it came with and what that report does not say.
The five reports on the D-to-Z side
From GIA's own comparison table, checked 6 October 2026:
| Report | Weights accepted | What distinguishes it |
|---|---|---|
| Diamond Grading Report | 0.15+ carats | The full document, plotted clarity diagram included |
| Diamond Origin Report | 0.15+ carats | Adds country of origin |
| Diamond Dossier | 0.15 to 1.99 carats | No plotted diagram; significant clarity characteristics listed instead |
| Diamond eReport | 0.15 to 2.99 carats | Paperless, with a digital photograph; no plotted diagram |
| Diamond Focus Report | 0.15 to 0.39 carats | Round brilliant only; plotted diagram, clarity characteristics and proportion diagram all omitted |
All five carry the 4Cs assessment, shape and cutting style, measurements, polish and symmetry, fluorescence, and testing for natural versus laboratory-grown diamonds and treatments. Against cut grade the same table carries a qualifier: for standard round brilliant cut only.
Two of the omissions are worth reading closely. GIA's 4Cs explanation of plotting diagrams says that on the Dossier and eReport "up to four of the diamond's significant clarity characteristics are listed to support the clarity grade," with an inscription or digital image provided to help identify the stone, and that "GIA follows the same standards and criteria to determine the clarity grade" with or without a diagram. The Focus Report goes further: its submission guidelines accept 0.15 to 0.39 carats, round brilliant cut only, D-to-Z natural and untreated, and state that "Plotted diagram, clarity characteristics and proportion diagram are not included."
So a champagne diamond under two carats is eligible for a Dossier, and if that is the report it holds, the missing diagram is the tier rather than a gap in the grading. Where the inclusions sit inside a warm stone, and why that question is different from the grade, is covered in champagne diamond clarity.
The three reports on the colored-diamond side
The fancy-graded stones here are a smaller group with a different paperwork problem. GIA's colored-diamond comparison, checked the same day, lists three reports:
| Report | Weights accepted | Clarity grade | Polish, symmetry, fluorescence |
|---|---|---|---|
| Colored Diamond Grading Report | 0.15+ carats | Yes, with plotted diagram | Yes |
| Colored Diamond Origin Report | 0.15+ carats | Yes, with plotted diagram | Yes |
| Colored Diamond Identification and Origin Report | Any carat weight | No | No |
All three give the color grade and color origin, carat weight, measurements, and testing for natural versus synthetic and treatments. None of the three shows a cut grade.
The third row is the one that surprises shoppers. A Fancy Brown listing with no clarity grade and no finish grades may be describing its report accurately: that report never carried them. Asking which of the three a stone holds is a more useful question than asking the retailer to supply a grade that does not exist.
What is missing on every report, whatever the tier
A cut grade on anything but a round brilliant. GIA's 4Cs pages state that "Diamond cut grades are only given to round brilliant cut diamonds because they are the only cut that have standardized facets," and that all other shapes are fancy shapes. On the 2026-10-06 snapshot, 1,264 of the 2,539 stones indexed here are round; every pear, oval, cushion, marquise, heart, emerald, radiant, asscher and princess among the rest has no cut grade to read, and a round graded on the colored-diamond side has none either. Polish and symmetry describe finish, not proportion, so the ratio and depth have to be worked out from the measurements.
Any statement of value. GIA is direct about this: "a diamond report is not a certificate or guarantee and does not indicate a diamond's monetary value," and an appraisal — "an estimate of a diamond's monetary worth" — is a separate document produced by someone else. What a stone costs is a retailer's asking price, and how this site compares those prices against a matched near-colorless stone is set out on the prices page.
Whether you will like the color. The report settles the grade and nothing about how a tint reads in a setting, which is why the color origin line matters more than any photograph: it records whether the color is natural or the result of treatment, and natural or treated explains where that line sits.
What our index shows, read 2026-10-06 on the 2026-10-06 data snapshot
2,539 unique verified natural brown diamonds, deduplicated by GIA report number, across 4,732 retailer listings at 9 retailers, with 1,115 stones listed at more than one retailer. By GIA wording: 2,004 Faint Brown, 123 Very Light Brown and 18 Light Brown on the D-to-Z scale, and 342 Fancy Brown and 52 Fancy Light Brown on the colored-diamond scale. Median asking price $1,428, range $92 to $593,280; 2,266 stones are listed below their matched near-colorless G–H benchmark, at a median discount of 46%. Every stone here was admitted by reading the text of its grading report, and the figures are retailer asking prices rather than records of completed sales.
Reading a report number before you commit
- Find the GIA report number on the listing, then resolve it in GIA's own Report Check service rather than in a PDF hosted somewhere else.
- Read the color grade line first. A letter followed by brown wording is a D-to-Z stone; a written grade with brown last is a brown-dominant colored diamond; a bare letter means no notation was recorded.
- Check that carat weight, shape and measurements match the listing. A report describing a different stone is a reason to stop.
- Note which report type it is before treating a blank field as an omission. Weight alone rules some tiers out: nothing over 1.99 carats is a Dossier, and nothing over 0.39 carats is a Focus Report.
- If polish, symmetry or fluorescence are absent on a fancy-graded stone, ask which of the three colored reports it holds. Fluorescence behaves differently on a warm stone in any case — does fluorescence matter on a champagne diamond works through what GIA's research tested.
- If the same report number appears at more than one retailer, compare those listings against each other before comparing anything else. On the snapshot above, 1,115 stones were multi-listed.
The two rules that admit a stone to this index, and the step-by-step check you can run on any report yourself, are in how we verify every stone. The shallow end of the scale is on Faint Brown, which is where most of these reports land.
