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Radiant|Natural|GIA

0.40ct F SI1 Radiant Natural Diamond

EX • F/SI1 • GIA 7556226406

Certificate GIA 7556226406

Diamond specifications and retailer prices

From £306 GBP
As of November 4, 2026
Save £549 GBP (64%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,428 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.4ct natural radiant diamond

This 0.4ct natural radiant sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7556226406. Listed at 24 retailers as of November 4, 2026, with a 179% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.40
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle52.1°
OriginNatural
Grading LabGIA
CertificateGIA 7556226406
Dimensions5.53 × 3.63 × 2.45 mm
L/W Ratio1.52
Girdle conditionPolished
Top View
5.53 mm3.63 mm0.40 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7556226406
Side View
Table 67.0%Crown 35.7°Girdle: THN-MEDPavilion 52.1°Culet: NoneDepth 67.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,428 GBP|Low: £306 GBP|High: £1,431 GBP|Avg: £510 GBP|+18.1%
NZ Jewellers
Retailer 2
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Retailer 22
Retailer 23
November 7, 2026
Retailer 6£306 GBP
Retailer 3£312 GBP
Retailer 21£338 GBP
Retailer 16£344 GBP
Retailer 4£364 GBP
Retailer 17£364 GBP
Retailer 18£386 GBP
Retailer 7£389 GBP
Retailer 23£396 GBP
Retailer 11£411 GBP
Retailer 22£418 GBP
Retailer 12£426 GBP
Retailer 15£426 GBP
Retailer 14£441 GBP
Retailer 13£461 GBP
Retailer 10£493 GBP
Retailer 20£503 GBP
Retailer 9£510 GBP
Retailer 8£552 GBP
Retailer 5£581 GBP
Retailer 19£750 GBP
Retailer 2£855 GBP
NZ Jewellers£1,428 GBP

22 data points across 23 retailers

24 retailers£306 GBP to £855 GBP

A
Cheapest Retailer
-
£306 GBP
A
Retailer 2
-
£312 GBP
View
Final sale: no returns
A
Retailer 3
-
£338 GBP
View
A
Retailer 4
-
£344 GBP
View
A
Retailer 5
-
£364 GBP
View
A
Retailer 6
-
£364 GBP
View
A
Retailer 7
-
£386 GBP
View
B+
Retailer 8
-
£389 GBP
View
A
Retailer 9
-
£396 GBP
View
B+
Retailer 10
-
£411 GBP
View
B+
Retailer 11
-
£418 GBP
View
B+
Retailer 12
-
£426 GBP
View
B+
Retailer 13
-
£426 GBP
View
B+
Retailer 14
-
£441 GBP
View
B+
Retailer 15
-
£461 GBP
View
B+
Retailer 16
-
£493 GBP
View
B+
Retailer 17
-
£503 GBP
View
B+
Retailer 18
-
£510 GBP
View
B+
Retailer 19
-
£552 GBP
View
B+
Retailer 20
-
£581 GBP
View
Retailer 21
-
£581 GBP
View
Price last confirmed 35 days ago
B
Retailer 22
-
£750 GBP
View
B
Retailer 23
-
£855 GBP
View
Most Expensive
NZ Jewellers
565bd71a-b07f-4fb5-a184-92c0deb60a3e · Nov 5
£1,428 GBP
$1,912 USD
View
Price under review
23 more retailers have this diamond
Prices start from £306 GBPSave up to £549 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.40ct Radiant
£306 GBP