Caratlytics⌃ Diamond Market Intelligence
MethodologyThe ScorePrice IndexGlossaryGovernance
The Caratlytics Score

One number for a whole stone.

The Caratlytics Score condenses four published sub-scores into a single 0 to 100 figure and a fixed letter grade. Quality is the largest pillar, and the one you can estimate yourself from any certificate. Use the widget below to see an indicative quality grade.

§ A
Grade a stone

From certificate to grade.

Enter the fields as they appear on the report. The widget runs the published Quality formula, weighting cut, color, clarity, proportions, polish, symmetry and fluorescence exactly as the specification does. The more of the certificate you enter, the higher your data coverage and the more precise the grade.

Core grades
Improve accuracy (from the certificate)
0.301.002.505.00
Indicative quality grade
·
0 / 100
Cut · 25
0
Color · 20
0
Clarity · 18
0
Data coverage
0

Indicative only. This widget runs the published Quality formula on the fields you enter, so the grade rises as you add more of the certificate. A full Caratlytics Score also folds in Value, Certification and Market, which require live cross-retailer pricing, and is computed automatically for stones observed on Carat Hunter. Nothing here is an appraisal or financial advice.

§ B
The grade scale

Six grades, fixed and published.

The same 0 to 100 bands are used everywhere the score appears. They never move with the market; only a stone's inputs move it between them.

A+
90 to 100
Exceptional
A
80 to 89
Excellent
B+
70 to 79
Very Good
B
60 to 69
Good
C
50 to 59
Average
D
0 to 49
Below Average
§ C
Inside the score

What each pillar measures.

The widget covers Quality. Here is how the other three pillars complete the picture once a stone is observed live.

Overall = Quality × 0.35 + Value × 0.30 + Certification × 0.20 + Market × 0.15
35%
Quality
Gemological merit: cut, color, clarity, proportions, finish and fluorescence, graded against published tables.
30%
Value
Price positioning: where the stone's price per carat sits against the statistical baseline for its category.
20%
Certification
Trust: which laboratory graded the stone, how complete its data is, and whether the certificate checks out.
15%
Market
Market intelligence: cross-retailer verification, 30 day price trend, stability and savings potential.
§ D

Questions and answers

What is a Caratlytics Score?

A 0 to 100 composite measure of a diamond listing, combining gemological quality (35%), price value (30%), certification trust (20%) and market intelligence (15%). It is computed by the Carat Hunter platform for every certified diamond it observes and its full methodology is published on this site.

Is Caratlytics independent of retailers?

Yes. Retailers cannot pay for scores, placement or index inclusion, and no retailer sees a score before it is published. Caratlytics is not independent of Carat Hunter: it is developed by the same team, and that common ownership is disclosed on every page.

Is the Caratlytics Score a grading report?

No. Grading is what laboratories like GIA and IGI do to the physical stone. The Caratlytics Score takes those grades as inputs and adds what laboratories do not measure: price positioning, data trust and market corroboration.

Why does a diamond show no score?

Usually the data coverage gate: when less than 60 percent of the weighted gemological evidence is present, the methodology refuses to issue a quality score rather than guess. Sparse listings are excluded from ranked results.

Can the same diamond have different scores at different retailers?

Yes, by design. Quality and certification attach to the stone, but value and market attach to the listing: the same certificate priced 2,000 USD apart at two retailers will score differently, and the cheaper listing scores higher.

Who pays for Caratlytics?

Carat Hunter funds it from consumer subscriptions. There are no affiliate commissions, no retailer fees and no advertising on this site. The funding model is documented on the governance page.