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Cushion|Lab Grown|IGI

4.05ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • IGI LG823613807

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG823613807

Diamond specifications and retailer prices

From €429 EUR
£379 GBP
As of November 2, 2026
Save €1,639 EUR (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €2,068 EUR at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 4.05ct lab-grown cushion diamond

This 4.05ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG823613807 or 823613807. Listed at 11 retailers as of October 28, 2026, with prices from €429 to €2,068, a €1,639 spread on the same certified stone. Rare Carat lists it at €2,068. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

4.05
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823613807
Dimensions10.04 × 9.05 × 5.70 mm
L/W Ratio1.11
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.04 mm9.05 mm4.05 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823613807
Side View
Table 64.0%Crown 34.2°Girdle: MED-THKPavilion 37.9°Culet: NoneDepth 63.0%

Caratlytics Score

How it works →
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: €429 EUR|Low: €381 EUR|High: €1,869 EUR|Avg: €954 EUR|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 1€429 EUR
Retailer 9€448 EUR
Retailer 10€498 EUR
Retailer 5€624 EUR
Retailer 2€667 EUR
Retailer 4€816 EUR
Retailer 8€1,023 EUR
Retailer 6€1,627 EUR
Retailer 7€1,692 EUR
Retailer 3€1,826 EUR

31 data points across 10 retailers

11 retailers€429 EUR to €2,068 EUR

A
Cheapest Retailer
-
€429 EUR
£379 GBP
A
Retailer 2
-
€448 EUR
$503 USD
View
Final sale: no returns
Retailer 3
-
€498 EUR
$558 USD
View
Price last confirmed 17 days ago
A
Retailer 4
-
€624 EUR
$700 USD
View
B+
Retailer 5
-
€667 EUR
$748 USD
View
A
Retailer 6
-
€816 EUR
£721 GBP
View
A
Retailer 7
-
€1,023 EUR
$1,147 USD
View
B
Retailer 8
-
€1,627 EUR
$1,825 USD
View
B
Retailer 9
-
€1,692 EUR
$1,898 USD
View
B
Retailer 10
-
€1,826 EUR
£1,613 GBP
View
Most Expensive
B
Rare Carat
G 2 A_l_823613807 · Oct 28
€2,068 EUR
$2,320 USD
View
10 more retailers have this diamond
Prices start from €429 EURSave up to €1,639 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
4.05ct Cushion
€429 EUR