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Cushion|Natural|GIA

0.40ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 2554949490

Certificate GIA 2554949490

Diamond specifications and retailer prices

From £435 GBP
As of November 6, 2026
Save £382 GBP (47%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £817 GBP at MOH London · As of November 4, 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 E 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 2554949490. Listed at 5 retailers as of November 4, 2026, with prices from £435 to £817, a £382 spread on the same certified stone. MOH London lists it at £817. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2554949490
Dimensions4.11 × 4.03 × 2.81 mm
L/W Ratio1.02
Key to symbols
Feather
Top View
4.11 mm4.03 mm0.40 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2554949490
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCuletDepth 69.8%

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: £817 GBP|Low: £412 GBP|High: £899 GBP|Avg: £566 GBP|-9.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3£435 GBP
Retailer 4£485 GBP
Retailer 2£530 GBP
Retailer 5£561 GBP
MOH London£817 GBP

46 data points across 5 retailers

5 retailers£435 GBP to £817 GBP

A
Cheapest Retailer
-
£435 GBP
B+
Retailer 2
-
£485 GBP
View
B+
Retailer 3
-
£530 GBP
View
Retailer 4
-
£561 GBP
View
Price last confirmed 33 days ago
Most Expensive
B
MOH London
978F7D1E5 · Nov 4
£817 GBP
View
4 more retailers have this diamond
Prices start from £435 GBPSave up to £382 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
£435 GBP