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Cushion|Natural|GIA

0.40ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 5436293478

Certificate GIA 5436293478

Diamond specifications and retailer prices

From £373 GBP
As of November 6, 2026
Save £644 GBP (63%) vs most expensive(unlock to see where)
15 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 5436293478. Listed at 15 retailers as of November 4, 2026, with prices from £373 to £1,017, a £644 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
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5436293478
Dimensions4.41 × 4.12 × 2.85 mm
L/W Ratio1.07
Top View
4.41 mm4.12 mm0.40 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5436293478
Side View
Table 56.0%CrownGirdle: THN-THKPavilionCulet: 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: £426 GBP|High: £1,030 GBP|Avg: £614 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 3£426 GBP
Retailer 9£475 GBP
Retailer 10£487 GBP
Retailer 2£533 GBP
Retailer 4£583 GBP
Retailer 5£591 GBP
Retailer 7£604 GBP
Retailer 8£663 GBP
Retailer 6£684 GBP
MOH London£1,017 GBP

43 data points across 10 retailers

15 retailers£373 GBP to £1,017 GBP

A
Cheapest Retailer
-
£373 GBP
A
Retailer 2
-
£426 GBP
View
B+
Retailer 3
-
£462 GBP
View
Retailer 4
-
£475 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£509 GBP
View
B+
Retailer 6
-
£533 GBP
View
B+
Retailer 7
-
£539 GBP
View
B+
Retailer 8
-
£583 GBP
View
B+
Retailer 9
-
£591 GBP
View
B+
Retailer 10
-
£604 GBP
View
B
Retailer 11
-
£614 GBP
View
B
Retailer 12
-
£632 GBP
View
Retailer 13
-
£663 GBP
View
Price last confirmed 33 days ago
B+
Retailer 14
-
£684 GBP
View
Most Expensive
B
MOH London
D4368579A · Nov 4
£1,017 GBP
View
14 more retailers have this diamond
Prices start from £373 GBPSave up to £644 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
£373 GBP