The diamond, considered.
An independent reading of your diamond report—and where to find the exact stone.
The Carat Standard is an independent authority on diamonds. Read any GIA or IGI report with a clear 0–100 score, compare jewelers offering the same stone, and explore the Collection and Diamond Academy.
What the report reader does
Enter a GIA, IGI, GCAL, HRD Antwerp, GSI, or legacy AGS report number to receive a consistent reading of the facts that laboratory reports: proportions, finish, color, clarity, fluorescence, measurements, and available comments.
The Carat Standard Score is a 0–100 guide to the disclosed report characteristics. Price, jewelers, and commercial relationships are never inputs. A scorecard is not a guarantee of beauty, value, identity, or condition, and it cannot replace exact-stone imagery or an in-person inspection.
Independent by design
The Carat Standard does not sell diamonds, hold inventory, or accept sponsored rankings or paid placement. It applies the same versioned method to every supported report and explains the strengths, cautions, and questions worth carrying into a showroom.
Our story
We wanted a clearer place to begin.
A diamond grading report gives you geometry. It tells you what a stone measures, but rarely how it will feel to look at every day.
The Carat Standard began with our own engagement ring search. We were excited, a little overwhelmed, and determined to get it right—and we quickly found ourselves caught between dense laboratory charts on one side and persuasive sales pitches on the other. Late nights comparing grading reports side by side taught us how much a report can reveal, and how little of it is ever explained.
So we built the resource we wished we’d had. It reads every report the same way—looking at the interplay of table, depth, angles, and transparency—so you can walk into a showroom with an honest, independent perspective and the right questions already in hand.
And once the report is read, we show where that exact stone is offered, so you may study its photographs and video before you decide.
No sponsored rankings, no inventory to move. Just the clear, dependable companion we wanted for our own search—now here for yours.
Frequently asked questions
What does The Carat Standard do?
We read a diamond’s grading report with the care the stone deserves. Every characteristic the laboratory records is set out plainly, alongside what it may mean for the diamond and what paper alone cannot convey.
Which reports can I read?
Enter a report number from GIA, IGI, GCAL, GSI, HRD, or AGS. Where a laboratory’s record cannot be opened directly, as with GIA, simply download the PDF from the laboratory’s own report-check page and upload it here.
Can a grading report tell me whether a diamond is beautiful?
Not entirely. A report records a diamond’s facts with precision; beauty is a matter of light and presence. Facet pattern, transparency, contrast, and the way a stone speaks to you are best judged through fine imagery or, ideally, in person.
What is The Carat Standard Scorecard and Score?
The Scorecard gathers a report’s proportions, finish, color, clarity, fluorescence, and any stated treatment into a single, consistent reading. The Carat Standard Score distills it to a figure from 0 to 100. It is a guide to the report—never a laboratory grade, an appraisal, or a substitute for seeing the stone.
Is a higher score always better?
Not necessarily. The score reflects how closely a report aligns with our report-based standards. Taste, transparency, facet pattern, and presence remain the province of the individual stone, and a measurement outside our preferred range is an invitation to look more closely, not a verdict.
What happens when a report leaves something out?
The reading says so, plainly. Missing detail lowers our confidence rather than being assumed, and no gap is ever filled from a seller’s description or a typical value. Some qualities—particularly in fancy shapes—reveal themselves only to the eye.
Can a score change?
Only when our method does. The same report always receives the same score under the same method version. Each reading notes its version, and whenever the method is refined, the whole of The Collection is re-scored so every stone is measured on equal terms.
Does price or a jeweler affect the score?
Never. The score is drawn from the laboratory report alone. Price, jeweler, and availability have no part in it, and no jeweler may pay for placement, a more flattering profile, or gentler language.
Does The Carat Standard earn money when I buy a diamond?
Only through some jeweler links, each marked “We may earn a commission.” Should you follow one and make a purchase, the jeweler may pay us a commission, at no cost to you. Every other link is plain, and we earn nothing from it. Our Affiliate Disclosure explains how these links work. Jewelers appear in alphabetical order, or from the lowest recorded price when you compare prices; none may pay to be shown, and a link has no bearing on our reading.
What is The Collection?
A public archive of diamonds, each read from its issuing laboratory’s own record. Report numbers looked up here are added so others may study them as well. Price and jewelers never influence its order.
Where can I buy a diamond from The Collection?
Where a jeweler’s own page shows the same report number, the scorecard leads you there, under “Where to buy this exact diamond.” Follow the link for the current price, the photographs, and the video, and confirm the report number on the jeweler’s page before you decide.
Why do I need an account to see prices?
You don’t need one for anything else. Every scorecard, lesson, and jeweler link is open to all. With a free account—your email address, nothing more—each scorecard also shows the price every jeweler listed when we last checked, and the date we checked it, so you may compare them side by side. Prices move, so the jeweler’s own page remains the final word.
What happens to a report I upload?
A PDF or image of the report is transcribed and read with the same care as any other. We retain the grading details and the Scorecard, not the file itself, so the same report always opens the same reading. As with any transcription, confirm material facts against the original document.
What is The Loupe?
Our diamond advisor. Ask about the stone before you and it answers from that reading, with discretion and without salesmanship. It will not recommend a jeweler, and it cannot see the stone itself. Questions are kept for about 90 days with personal details removed, so there is no need to share any.
Can I compare two diamonds?
Yes. Add two readings to Compare to see their characteristics side by side, with a summary of where they part ways. A difference on paper shows you where to look; the choice of which stone is yours remains a matter of the eye.
Can I read a laboratory-grown diamond report?
Yes. Laboratory-grown reports receive the same structured reading. Origin is meaningful context, but cut proportions, finish, clarity characteristics, and a careful viewing deserve equal attention. Since October 2025, GIA’s laboratory-grown reports classify eligible stones as Premium or Standard rather than using natural-diamond color and clarity grades, so the report date and service name matter.
Are fancy-color diamonds included?
No. A fancy-color diamond is judged on its own terms—hue, tone, and saturation—and a reading composed for the colorless scale would not do it justice. For these rarer stones, rely on the laboratory report and a private viewing.
Can the same diamond appear at more than one jeweler?
Often, yes. Many jewelers present stones from shared supplier inventory. When the laboratory and report number match, and the measurements and inscription agree, it may well be the same diamond offered by different houses. Weigh the full terms, returns, setting responsibility, and aftercare alongside price. Where we have found it, the scorecard names each house offering that exact report number.
Can the reading confirm the physical diamond?
No. Match the inscription and report details, verify the report with its issuing laboratory, and seek an independent examination whenever identity or condition matters.
How should I use the result?
As a place to begin. Let it guide your viewing and refine your questions—about the exact stone, its setting, the terms of return, and the care it will receive for years to come.