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Cushion|Lab Grown|IGI

4.02ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG743599835

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

Certificate IGI LG743599835

Diamond specifications and retailer prices

From £341 GBP
As of October 27, 2026
Save £2,032 GBP (86%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,373 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.02ct lab-grown cushion diamond

This 4.02ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG743599835 or 743599835. Listed at 14 retailers as of October 27, 2026, with prices from £341 to £2,373, a £2,032 spread on the same certified stone. Brilliant Earth lists it at £2,373. 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

4.02
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle31.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743599835
Dimensions9.03 × 8.73 × 5.56 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.03 mm8.73 mm4.02 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743599835
Side View
Table 61.0%Crown 32.7°Girdle: MED-STKPavilion 31.7°Culet: NoneDepth 63.7%

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 27
Current: £2,373 GBP|Low: £340 GBP|High: £2,373 GBP|Avg: £976 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 11£341 GBP
Retailer 6£368 GBP
Retailer 8£439 GBP
Retailer 14£485 GBP
Retailer 2£613 GBP
Retailer 3£640 GBP
Retailer 5£661 GBP
Retailer 12£670 GBP
Retailer 7£968 GBP
Retailer 4£1,032 GBP
Retailer 10£1,276 GBP
Retailer 13£1,499 GBP
Retailer 9£1,720 GBP
Brilliant Earth£2,373 GBP

39 data points across 14 retailers

14 retailers£341 GBP to £2,373 GBP

A
Cheapest Retailer
-
£341 GBP
A
Retailer 2
-
£439 GBP
HK$4,600 HKD
View
A
Retailer 3
-
£485 GBP
$650 USD
View
A
Retailer 4
-
£613 GBP
€782 EUR
View
B+
Retailer 5
-
£640 GBP
$857 USD
View
A
Retailer 6
-
£661 GBP
$885 USD
View
A
Retailer 7
-
£670 GBP
View
B+
Retailer 8
-
£968 GBP
$1,297 USD
View
B+
Retailer 9
-
£1,032 GBP
$1,383 USD
View
B+
Retailer 10
-
£1,276 GBP
SGD 2,310 SGD
View
B+
Retailer 11
-
£1,499 GBP
View
B+
Retailer 12
-
£1,720 GBP
$2,305 USD
View
B
Retailer 13
-
£1,728 GBP
$2,315 USD
View
Most Expensive
B
Brilliant Earth
16748012A · Oct 29
£2,373 GBP
$3,180 USD
View
13 more retailers have this diamond
Prices start from £341 GBPSave up to £2,032 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
4.02ct Cushion
£341 GBP