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Cushion|Natural|GIA

0.40ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 6555182513

Certificate GIA 6555182513

Diamond specifications and retailer prices

From £320 GBP
As of November 6, 2026
Save £697 GBP (69%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,017 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 6555182513. Listed at 10 retailers as of November 4, 2026, with prices from £320 to £1,017, a £697 spread on the same certified stone. MOH London lists it at £1,017. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555182513
Dimensions4.14 × 4.08 × 2.82 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud
Top View
4.14 mm4.08 mm0.40 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555182513
Side View
Table 63.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 69.2%

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 6
Current: £1,017 GBP|Low: £320 GBP|High: £1,030 GBP|Avg: £631 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 2£320 GBP
Retailer 4£533 GBP
Retailer 6£583 GBP
Retailer 7£604 GBP
Retailer 3£648 GBP
Retailer 8£663 GBP
Retailer 5£684 GBP
MOH London£1,017 GBP

37 data points across 8 retailers

10 retailers£320 GBP to £1,017 GBP

A
Cheapest Retailer
-
£320 GBP
B+
Retailer 2
-
£509 GBP
View
B+
Retailer 3
-
£526 GBP
View
B+
Retailer 4
-
£533 GBP
View
B+
Retailer 5
-
£583 GBP
View
B+
Retailer 6
-
£604 GBP
View
B+
Retailer 7
-
£648 GBP
View
Retailer 8
-
£663 GBP
View
Price last confirmed 33 days ago
B+
Retailer 9
-
£684 GBP
View
Most Expensive
B
MOH London
238577F87 · Nov 4
£1,017 GBP
View
9 more retailers have this diamond
Prices start from £320 GBPSave up to £697 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
£320 GBP