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Cushion|Natural|GIA

0.40ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 2556005164

Certificate GIA 2556005164

Diamond specifications and retailer prices

From £309 GBP
As of November 6, 2026
Save £373 GBP (55%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £681 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556005164. Listed at 10 retailers as of November 2, 2026, with prices from £309 to £681, a £373 spread on the same certified stone. MOH London lists it at £681. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556005164
Dimensions5.19 × 3.84 × 2.64 mm
L/W Ratio1.35
Top View
5.19 mm3.84 mm0.40 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556005164
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.9%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £681 GBP|Low: £309 GBP|High: £690 GBP|Avg: £490 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4£309 GBP
Retailer 7£318 GBP
Retailer 5£381 GBP
Retailer 6£404 GBP
Retailer 3£531 GBP
Retailer 2£593 GBP
MOH London£681 GBP

42 data points across 7 retailers

10 retailers£309 GBP to £681 GBP

A
Cheapest Retailer
-
£309 GBP
Retailer 2
-
£318 GBP
View
Price last confirmed 9 days ago
B+
Retailer 3
-
£341 GBP
View
B+
Retailer 4
-
£381 GBP
View
B+
Retailer 5
-
£392 GBP
View
B+
Retailer 6
-
£403 GBP
View
B+
Retailer 7
-
£404 GBP
View
B
Retailer 8
-
£531 GBP
View
B
Retailer 9
-
£593 GBP
View
Most Expensive
B
MOH London
1BBD7995A · Nov 2
£681 GBP
View
9 more retailers have this diamond
Prices start from £309 GBPSave up to £373 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