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Cushion|Lab Grown|IGI

0.40ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • IGI LG764635904

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG764635904

Diamond specifications and retailer prices

From £77 GBP
HK$800 HKD
As of October 29, 2026
Save £404 GBP (84%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £481 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.4ct lab-grown cushion diamond

This 0.4ct lab-grown cushion sits in the sub-half-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG764635904 or 764635904. Listed at 6 retailers as of October 29, 2026, with prices from £77 to £481, a £404 spread on the same certified stone. MOH London lists it at £481. 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
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38.9°
Pavilion angle42.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG764635904
Dimensions4.29 × 4.17 × 2.88 mm
L/W Ratio1.03
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
4.29 mm4.17 mm0.40 ctE / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG764635904
Side View
Table 70.0%Crown 38.9°Girdle: STK-THKPavilion 42.6°Culet: NoneDepth 69.1%

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: Oct 29
Current: £481 GBP|Low: £77 GBP|High: £481 GBP|Avg: £165 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 5£77 GBP
Retailer 8£95 GBP
Retailer 2£116 GBP
Retailer 3£135 GBP
Retailer 6£149 GBP
Retailer 7£167 GBP
Retailer 4£255 GBP
MOH London£481 GBP

2 data points across 8 retailers

6 retailers£77 GBP to £481 GBP

A
Cheapest Retailer
-
£77 GBP
HK$800 HKD
B+
Retailer 2
-
£116 GBP
View
B+
Retailer 3
-
£149 GBP
$199 USD
View
B+
Retailer 4
-
£167 GBP
View
B
Retailer 5
-
£255 GBP
$340 USD
View
Most Expensive
MOH London
LG764635904 · Oct 29
£481 GBP
View
5 more retailers have this diamond
Prices start from £77 GBPSave up to £404 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
£77 GBP