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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 €472 EUR
£415 GBP
As of November 2, 2026
Save €3,395 EUR (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €3,867 EUR 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 €472 to €3,867, a €3,395 spread on the same certified stone. Brilliant Earth lists it at €3,867. 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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Price History

Last verified: Nov 2
Current: €3,867 EUR|Low: €472 EUR|High: €6,668 EUR|Avg: €1,846 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€472 EUR
Retailer 11€689 EUR
Retailer 3€759 EUR
Retailer 8€861 EUR
Retailer 12€923 EUR
Retailer 7€942 EUR
Retailer 10€1,133 EUR
Retailer 14€1,412 EUR
Retailer 13€1,790 EUR
Retailer 4€1,841 EUR
Retailer 9€1,975 EUR
Retailer 5€2,393 EUR
Retailer 6€2,761 EUR
Brilliant Earth€3,867 EUR

42 data points across 14 retailers

14 retailers€472 EUR to €3,867 EUR

A
Cheapest Retailer
-
€472 EUR
£415 GBP
A
Retailer 2
-
€689 EUR
$770 USD
View
B+
Retailer 3
-
€759 EUR
$848 USD
View
A
Retailer 4
-
€861 EUR
View
A
Retailer 5
-
€923 EUR
$1,031 USD
View
A
Retailer 6
-
€942 EUR
£829 GBP
View
A
Retailer 7
-
€1,133 EUR
A$1,948 AUD
View
A
Retailer 8
-
€1,412 EUR
$1,577 USD
View
B+
Retailer 9
-
€1,790 EUR
SGD 2,703 SGD
View
B+
Retailer 10
-
€1,841 EUR
$2,056 USD
View
B+
Retailer 11
-
€1,975 EUR
$2,207 USD
View
B+
Retailer 12
-
€2,393 EUR
£2,105 GBP
View
Retailer 13
-
€2,761 EUR
$3,085 USD
View
Price last confirmed 25 days ago
Most Expensive
B
Brilliant Earth
22374626A · Oct 31
€3,867 EUR
$4,320 USD
View
13 more retailers have this diamond
Prices start from €472 EURSave up to €3,395 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
€472 EUR