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Cushion|Lab Grown|IGI

4.51ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG741592352

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

Certificate IGI LG741592352

Diamond specifications and retailer prices

From $655 SGD
£403 GBP
As of October 27, 2026
Save $3,832 SGD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,487 SGD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 4.51ct lab-grown cushion diamond

This 4.51ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG741592352 or 741592352. Listed at 13 retailers as of October 27, 2026, with prices from $655 to $4,487, a $3,832 spread on the same certified stone. Brilliant Earth lists it at $4,487. 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

4.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle33.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG741592352
Dimensions9.61 × 9.57 × 5.81 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.61 mm9.57 mm4.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG741592352
Side View
Table 65.0%Crown 34.8°Girdle: MED-THKPavilion 33.5°Culet: NoneDepth 60.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: $4,487 SGD|Low: $652 SGD|High: $8,476 SGD|Avg: $2,064 SGD|-47.1%
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
November 2, 2026
Retailer 10$655 SGD
Retailer 8$818 SGD
Retailer 4$908 SGD
Retailer 6$1,090 SGD
Retailer 3$1,181 SGD
Retailer 5$1,209 SGD
Retailer 11$1,248 SGD
Retailer 2$1,708 SGD
Retailer 7$1,730 SGD
Retailer 9$2,364 SGD
Retailer 12$2,783 SGD
Retailer 13$3,707 SGD
Brilliant Earth$4,487 SGD

39 data points across 13 retailers

13 retailers$655 SGD to $4,487 SGD

A
Cheapest Retailer
-
$655 SGD
£403 GBP
A
Retailer 2
-
$818 SGD
HK$5,000 HKD
View
Retailer 3
-
$908 SGD
$710 USD
View
Price last confirmed 5 days ago
A
Retailer 4
-
$1,090 SGD
€812 EUR
View
B+
Retailer 5
-
$1,181 SGD
$924 USD
View
A
Retailer 6
-
$1,209 SGD
$946 USD
View
A
Retailer 7
-
$1,248 SGD
£769 GBP
View
A
Retailer 8
-
$1,708 SGD
$1,336 USD
View
A
Retailer 9
-
$1,730 SGD
$1,353 USD
View
B+
Retailer 10
-
$2,364 SGD
View
B+
Retailer 11
-
$2,783 SGD
£1,714 GBP
View
Retailer 12
-
$3,707 SGD
$2,900 USD
View
Price last confirmed 14 days ago
Most Expensive
B
Brilliant Earth
16747795A · Oct 31
$4,487 SGD
$3,510 USD
View
12 more retailers have this diamond
Prices start from $655 SGDSave up to $3,832 SGD

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
4.51ct Cushion
$655 SGD