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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 $527 USD
£415 GBP
As of November 1, 2026
Save $3,793 USD (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $4,320 USD at Brilliant Earth · As of October 31, 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 October 31, 2026, with prices from $527 to $4,320, a $3,793 spread on the same certified stone. Brilliant Earth lists it at $4,320. 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
Color
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 1
Current: $4,320 USD|Low: $527 USD|High: $7,450 USD|Avg: $2,074 USD|-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 1, 2026
Retailer 2$527 USD
Retailer 11$770 USD
Retailer 3$848 USD
Retailer 8$962 USD
Retailer 12$1,031 USD
Retailer 7$1,053 USD
Retailer 10$1,266 USD
Retailer 14$1,577 USD
Retailer 13$2,000 USD
Retailer 4$2,056 USD
Retailer 9$2,207 USD
Retailer 5$2,673 USD
Retailer 6$3,085 USD
Brilliant Earth$4,320 USD

41 data points across 14 retailers

14 retailers$527 USD to $4,320 USD

A
Cheapest Retailer
-
$527 USD
£415 GBP
A
Retailer 2
-
$770 USD
View
B+
Retailer 3
-
$848 USD
View
A
Retailer 4
-
$962 USD
€916 EUR
View
A
Retailer 5
-
$1,031 USD
View
A
Retailer 6
-
$1,053 USD
£829 GBP
View
A
Retailer 7
-
$1,266 USD
A$1,948 AUD
View
A
Retailer 8
-
$1,577 USD
View
B+
Retailer 9
-
$2,000 USD
SGD 2,703 SGD
View
B+
Retailer 10
-
$2,056 USD
View
B+
Retailer 11
-
$2,207 USD
View
B+
Retailer 12
-
$2,673 USD
£2,105 GBP
View
Retailer 13
-
$3,085 USD
View
Price last confirmed 25 days ago
Most Expensive
B
Brilliant Earth
22374626A · Oct 31
$4,320 USD
View
13 more retailers have this diamond
Prices start from $527 USDSave up to $3,793 USD

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
$527 USD