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Cushion|Natural|GIA

0.40ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6552636084

Certificate GIA 6552636084

Diamond specifications and retailer prices

From £309 GBP
$414 USD
As of October 29, 2026
Save £354 GBP (53%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £662 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 0.4ct natural cushion diamond

This 0.4ct natural cushion 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 6552636084. Listed at 9 retailers as of October 29, 2026, with prices from £309 to £662, a £354 spread on the same certified stone. MOH London lists it at £662. 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
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6552636084
Dimensions5.02 × 4.03 × 2.64 mm
L/W Ratio1.25
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cavity
Top View
5.02 mm4.03 mm0.40 ctF / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6552636084
Side View
Table 66.0%CrownGirdle: VTN-VTKPavilionCulet: NoneDepth 65.6%

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: Oct 29
Current: £662 GBP|Low: £309 GBP|High: £688 GBP|Avg: £442 GBP|-3.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 3, 2026
Retailer 6£309 GBP
Retailer 7£331 GBP
Retailer 8£332 GBP
Retailer 2£374 GBP
Retailer 3£393 GBP
Retailer 5£444 GBP
Retailer 9£469 GBP
Retailer 4£523 GBP
MOH London£662 GBP

43 data points across 9 retailers

9 retailers£309 GBP to £662 GBP

A
Cheapest Retailer
-
£309 GBP
$414 USD
A
Retailer 2
-
£331 GBP
$444 USD
View
A
Retailer 3
-
£332 GBP
$445 USD
View
A
Retailer 4
-
£374 GBP
View
A
Retailer 5
-
£393 GBP
View
B+
Retailer 6
-
£444 GBP
ZAR 9,634 ZAR
View
Retailer 7
-
£469 GBP
A$968 AUD
View
Price last confirmed 30 days ago
B+
Retailer 8
-
£523 GBP
€668 EUR
View
Most Expensive
B
MOH London
BC35A9762 · Nov 2
£662 GBP
View
8 more retailers have this diamond
Prices start from £309 GBPSave up to £354 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 Cushion
£309 GBP