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Cushion|Lab Grown|IGI

4.09ct E SI2 Cushion Lab Grown Diamond

ID • E/SI2 • IGI LG743561585

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

Certificate IGI LG743561585

Diamond specifications and retailer prices

From $561 AUD
£311 GBP
As of October 27, 2026
Save $3,097 AUD (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,659 AUD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.09ct lab-grown cushion diamond

This 4.09ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG743561585 or 743561585. Listed at 12 retailers as of October 27, 2026, with prices from $561 to $3,659, a $3,097 spread on the same certified stone. Brilliant Earth lists it at $3,659. 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

4.09
Carat
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743561585
Dimensions9.05 × 8.98 × 5.90 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.05 mm8.98 mm4.09 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743561585
Side View
Table 64.0%Crown 35.6°Girdle: MED-THKPavilion 34.9°Culet: NoneDepth 65.7%

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: $3,659 AUD|Low: $560 AUD|High: $6,904 AUD|Avg: $1,858 AUD|-47.0%
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
October 31, 2026
Retailer 8$561 AUD
Retailer 5$587 AUD
Retailer 13$711 AUD
Retailer 6$991 AUD
Retailer 12$1,036 AUD
Retailer 4$1,156 AUD
Retailer 9$1,164 AUD
Retailer 2$1,580 AUD
Retailer 3$1,876 AUD
Retailer 7$2,036 AUD
Retailer 10$2,538 AUD
Retailer 11$3,296 AUD
Brilliant Earth$3,659 AUD

44 data points across 13 retailers

12 retailers$561 AUD to $3,659 AUD

A
Cheapest Retailer
-
$561 AUD
£311 GBP
A
Retailer 2
-
$711 AUD
HK$3,900 HKD
View
A
Retailer 3
-
$991 AUD
€663 EUR
View
B+
Retailer 4
-
$1,036 AUD
$728 USD
View
A
Retailer 5
-
$1,156 AUD
$812 USD
View
A
Retailer 6
-
$1,164 AUD
£644 GBP
View
B+
Retailer 7
-
$1,580 AUD
$1,110 USD
View
B+
Retailer 8
-
$1,876 AUD
$1,318 USD
View
B+
Retailer 9
-
$2,036 AUD
SGD 1,933 SGD
View
B+
Retailer 10
-
$2,538 AUD
£1,404 GBP
View
B
Retailer 11
-
$3,296 AUD
$2,315 USD
View
Most Expensive
B
Brilliant Earth
16748013A · Oct 30
$3,659 AUD
$2,570 USD
View
11 more retailers have this diamond
Prices start from $561 AUDSave up to $3,097 AUD

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
4.09ct Cushion
$561 AUD