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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 $753 AUD
£415 GBP
As of November 2, 2026
Save $5,412 AUD (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,164 AUD 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 $753 to $6,164, a $5,412 spread on the same certified stone. Brilliant Earth lists it at $6,164. 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

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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: Nov 2
Current: $6,164 AUD|Low: $753 AUD|High: $10,630 AUD|Avg: $2,953 AUD|-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 2$753 AUD
Retailer 11$1,099 AUD
Retailer 3$1,210 AUD
Retailer 8$1,372 AUD
Retailer 12$1,471 AUD
Retailer 7$1,502 AUD
Retailer 10$1,807 AUD
Retailer 14$2,250 AUD
Retailer 13$2,854 AUD
Retailer 4$2,934 AUD
Retailer 9$3,149 AUD
Retailer 5$3,815 AUD
Retailer 6$4,402 AUD
Brilliant Earth$6,164 AUD

41 data points across 14 retailers

14 retailers$753 AUD to $6,164 AUD

A
Cheapest Retailer
-
$753 AUD
£415 GBP
A
Retailer 2
-
$1,099 AUD
$770 USD
View
B+
Retailer 3
-
$1,210 AUD
$848 USD
View
A
Retailer 4
-
$1,372 AUD
€916 EUR
View
A
Retailer 5
-
$1,471 AUD
$1,031 USD
View
A
Retailer 6
-
$1,502 AUD
£829 GBP
View
A
Retailer 7
-
$1,807 AUD
View
A
Retailer 8
-
$2,250 AUD
$1,577 USD
View
B+
Retailer 9
-
$2,854 AUD
SGD 2,703 SGD
View
B+
Retailer 10
-
$2,934 AUD
$2,056 USD
View
B+
Retailer 11
-
$3,149 AUD
$2,207 USD
View
B+
Retailer 12
-
$3,815 AUD
£2,105 GBP
View
Retailer 13
-
$4,402 AUD
$3,085 USD
View
Price last confirmed 26 days ago
Most Expensive
B
Brilliant Earth
22374626A · Nov 2
$6,164 AUD
$4,320 USD
View
13 more retailers have this diamond
Prices start from $753 AUDSave up to $5,412 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
$753 AUD