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Cushion|Natural|GIA

0.40ct E SI1 Cushion Natural Diamond

GD • E/SI1 • GIA 2556278709

Certificate GIA 2556278709

Diamond specifications and retailer prices

From £433 GBP
As of November 4, 2026
Save £576 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,010 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2556278709. Listed at 14 retailers as of November 4, 2026, with prices from £433 to £1,010, a £576 spread on the same certified stone. MOH London lists it at £1,010. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
E
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556278709
Dimensions4.97 × 3.80 × 2.62 mm
L/W Ratio1.31
Key to symbols
Cloud, Crystal, Feather
Top View
4.97 mm3.80 mm0.40 ctE / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556278709
Side View
Table 63.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 69.0%

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: £1,010 GBP|Low: £412 GBP|High: £1,022 GBP|Avg: £621 GBP|+12.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 9£433 GBP
Retailer 3£483 GBP
Retailer 4£517 GBP
Retailer 7£525 GBP
Retailer 13£546 GBP
Retailer 12£566 GBP
Retailer 5£576 GBP
Retailer 10£590 GBP
Retailer 11£614 GBP
Retailer 6£659 GBP
Retailer 8£695 GBP
Retailer 2£881 GBP
MOH London£1,010 GBP

35 data points across 13 retailers

14 retailers£433 GBP to £1,010 GBP

Retailer 1
-
£400 GBP
Price last confirmed 28 days ago
A
Retailer 2
-
£433 GBP
View
Retailer 3
-
£483 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£517 GBP
View
B+
Retailer 5
-
£525 GBP
View
B
Retailer 6
-
£546 GBP
View
B
Retailer 7
-
£566 GBP
View
Retailer 8
-
£576 GBP
View
Price last confirmed 34 days ago
B
Retailer 9
-
£590 GBP
View
B
Retailer 10
-
£614 GBP
View
B
Retailer 11
-
£659 GBP
View
B
Retailer 12
-
£695 GBP
View
C
Retailer 13
-
£881 GBP
View
Most Expensive
B
MOH London
1BD99E0EB · Nov 4
£1,010 GBP
View
13 more retailers have this diamond
Prices start from £433 GBPSave up to £576 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
£433 GBP