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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 HK$4,018 HKD
£403 GBP
As of October 27, 2026
Save HK$23,521 HKD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$27,540 HKD at Brilliant Earth · As of November 2, 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 HK$4,018 to HK$27,540, a HK$23,521 spread on the same certified stone. Brilliant Earth lists it at HK$27,540. 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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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: HK$27,540 HKD|Low: HK$4,005 HKD|High: HK$52,020 HKD|Avg: HK$12,619 HKD|-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 10HK$4,018 HKD
Retailer 8HK$5,022 HKD
Retailer 4HK$5,571 HKD
Retailer 7HK$6,690 HKD
Retailer 3HK$7,250 HKD
Retailer 5HK$7,422 HKD
Retailer 11HK$7,662 HKD
Retailer 6HK$10,482 HKD
Retailer 2HK$10,773 HKD
Retailer 9HK$14,509 HKD
Retailer 12HK$17,079 HKD
Retailer 13HK$22,754 HKD
Brilliant EarthHK$27,540 HKD

39 data points across 13 retailers

13 retailersHK$4,018 HKD to HK$27,540 HKD

A
Cheapest Retailer
-
HK$4,018 HKD
£403 GBP
A
Retailer 2
-
HK$5,022 HKD
View
Retailer 3
-
HK$5,571 HKD
$710 USD
View
Price last confirmed 5 days ago
A
Retailer 4
-
HK$6,690 HKD
€812 EUR
View
Retailer 5
-
HK$7,250 HKD
$924 USD
View
Price last confirmed 7 days ago
Retailer 6
-
HK$7,422 HKD
$946 USD
View
Price last confirmed 7 days ago
A
Retailer 7
-
HK$7,662 HKD
£769 GBP
View
A
Retailer 8
-
HK$10,482 HKD
$1,336 USD
View
B+
Retailer 9
-
HK$10,773 HKD
$1,373 USD
View
B+
Retailer 10
-
HK$14,509 HKD
SGD 2,499 SGD
View
B+
Retailer 11
-
HK$17,079 HKD
£1,714 GBP
View
Retailer 12
-
HK$22,754 HKD
$2,900 USD
View
Price last confirmed 14 days ago
Most Expensive
B
Brilliant Earth
16747795A · Nov 2
HK$27,540 HKD
$3,510 USD
View
12 more retailers have this diamond
Prices start from HK$4,018 HKDSave up to HK$23,521 HKD

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
HK$4,018 HKD