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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 €470 EUR
£415 GBP
As of November 2, 2026
Save €3,381 EUR (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €3,852 EUR 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 €470 to €3,852, a €3,381 spread on the same certified stone. Brilliant Earth lists it at €3,852. 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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Price History

Last verified: Nov 2
Current: €3,852 EUR|Low: €470 EUR|High: €6,642 EUR|Avg: €1,845 EUR|-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€470 EUR
Retailer 11€687 EUR
Retailer 3€756 EUR
Retailer 8€858 EUR
Retailer 12€919 EUR
Retailer 7€938 EUR
Retailer 10€1,129 EUR
Retailer 14€1,406 EUR
Retailer 13€1,783 EUR
Retailer 4€1,833 EUR
Retailer 9€1,968 EUR
Retailer 5€2,384 EUR
Retailer 6€2,751 EUR
Brilliant Earth€3,852 EUR

41 data points across 14 retailers

14 retailers€470 EUR to €3,852 EUR

A
Cheapest Retailer
-
€470 EUR
£415 GBP
A
Retailer 2
-
€687 EUR
$770 USD
View
B+
Retailer 3
-
€756 EUR
$848 USD
View
A
Retailer 4
-
€858 EUR
View
A
Retailer 5
-
€919 EUR
$1,031 USD
View
A
Retailer 6
-
€938 EUR
£829 GBP
View
A
Retailer 7
-
€1,129 EUR
A$1,948 AUD
View
A
Retailer 8
-
€1,406 EUR
$1,577 USD
View
B+
Retailer 9
-
€1,783 EUR
SGD 2,703 SGD
View
B+
Retailer 10
-
€1,833 EUR
$2,056 USD
View
B+
Retailer 11
-
€1,968 EUR
$2,207 USD
View
Retailer 12
-
€2,384 EUR
£2,105 GBP
View
Price last confirmed 7 days ago
Retailer 13
-
€2,751 EUR
$3,085 USD
View
Price last confirmed 26 days ago
Most Expensive
B
Brilliant Earth
22374626A · Nov 2
€3,852 EUR
$4,320 USD
View
13 more retailers have this diamond
Prices start from €470 EURSave up to €3,381 EUR

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
€470 EUR