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Cushion|Lab Grown|IGI

4.09ct F VS1 Cushion Lab Grown Diamond

EX • F/VS1 • IGI LG816617452

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

Certificate IGI LG816617452

Diamond specifications and retailer prices

From HK$4,138 HKD
£415 GBP
As of November 2, 2026
Save HK$29,757 HKD (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$33,895 HKD at Brilliant Earth · As of November 2, 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 F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG816617452 or 816617452. Listed at 14 retailers as of November 2, 2026, with prices from HK$4,138 to HK$33,895, a HK$29,757 spread on the same certified stone. Brilliant Earth lists it at HK$33,895. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.09
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.7°
Pavilion angle30.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816617452
Dimensions9.06 × 8.52 × 5.71 mm
L/W Ratio1.06
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.06 mm8.52 mm4.09 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816617452
Side View
Table 65.0%Crown 45.7°Girdle: STK-THKPavilion 30.3°Culet: NoneDepth 67.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: HK$33,895 HKD|Low: HK$4,138 HKD|High: HK$58,453 HKD|Avg: HK$16,237 HKD|-42.0%
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
Retailer 14
November 2, 2026
Retailer 2HK$4,138 HKD
Retailer 11HK$6,041 HKD
Retailer 3HK$6,653 HKD
Retailer 8HK$7,546 HKD
Retailer 12HK$8,089 HKD
Retailer 7HK$8,258 HKD
Retailer 10HK$9,935 HKD
Retailer 14HK$12,373 HKD
Retailer 13HK$15,694 HKD
Retailer 4HK$16,134 HKD
Retailer 9HK$17,316 HKD
Retailer 5HK$20,975 HKD
Retailer 6HK$24,205 HKD
Brilliant EarthHK$33,895 HKD

41 data points across 14 retailers

14 retailersHK$4,138 HKD to HK$33,895 HKD

A
Cheapest Retailer
-
HK$4,138 HKD
£415 GBP
A
Retailer 2
-
HK$6,041 HKD
$770 USD
View
B+
Retailer 3
-
HK$6,653 HKD
$848 USD
View
A
Retailer 4
-
HK$7,546 HKD
€916 EUR
View
A
Retailer 5
-
HK$8,089 HKD
$1,031 USD
View
A
Retailer 6
-
HK$8,258 HKD
£829 GBP
View
A
Retailer 7
-
HK$9,935 HKD
A$1,948 AUD
View
A
Retailer 8
-
HK$12,373 HKD
$1,577 USD
View
B+
Retailer 9
-
HK$15,694 HKD
SGD 2,703 SGD
View
B+
Retailer 10
-
HK$16,134 HKD
$2,056 USD
View
B+
Retailer 11
-
HK$17,316 HKD
$2,207 USD
View
Retailer 12
-
HK$20,975 HKD
£2,105 GBP
View
Price last confirmed 7 days ago
Retailer 13
-
HK$24,205 HKD
$3,085 USD
View
Price last confirmed 26 days ago
Most Expensive
B
Brilliant Earth
22374626A · Nov 2
HK$33,895 HKD
$4,320 USD
View
13 more retailers have this diamond
Prices start from HK$4,138 HKDSave up to HK$29,757 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
4.09ct Cushion
HK$4,138 HKD