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Cushion|Lab Grown|IGI

4.01ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG818649921

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818649921

Diamond specifications and retailer prices

From €517 EUR
£457 GBP
As of November 2, 2026
Save €1,986 EUR (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €2,504 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 4.01ct lab-grown cushion diamond

This 4.01ct 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 LG818649921 or 818649921. Listed at 11 retailers as of November 1, 2026, with prices from €517 to €2,504, a €1,986 spread on the same certified stone. MOH London lists it at €2,504. 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

4.01
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.1°
Pavilion angle36.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818649921
Dimensions11.61 × 7.77 × 5.31 mm
L/W Ratio1.49
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.61 mm7.77 mm4.01 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818649921
Side View
Table 61.0%Crown 31.1°Girdle: STK-THKPavilion 36.1°Culet: NoneDepth 68.3%

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: €2,504 EUR|Low: €517 EUR|High: €2,792 EUR|Avg: €1,345 EUR|-10.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 2€517 EUR
Retailer 11€542 EUR
Retailer 7€600 EUR
Retailer 5€718 EUR
Retailer 4€934 EUR
Retailer 6€938 EUR
Retailer 10€1,033 EUR
Retailer 8€1,944 EUR
Retailer 9€1,947 EUR
Retailer 3€2,067 EUR
MOH London€2,504 EUR

36 data points across 11 retailers

11 retailers€517 EUR to €2,504 EUR

A
Cheapest Retailer
-
€517 EUR
£457 GBP
A
Retailer 2
-
€542 EUR
$608 USD
View
Final sale: no returns
Retailer 3
-
€600 EUR
$673 USD
View
Price last confirmed 22 days ago
A
Retailer 4
-
€718 EUR
$805 USD
View
A
Retailer 5
-
€934 EUR
£825 GBP
View
B+
Retailer 6
-
€938 EUR
$1,052 USD
View
A
Retailer 7
-
€1,033 EUR
$1,159 USD
View
B
Retailer 8
-
€1,944 EUR
$2,180 USD
View
B
Retailer 9
-
€1,947 EUR
$2,184 USD
View
Retailer 10
-
€2,067 EUR
$2,319 USD
View
Price last confirmed 57 days ago
Most Expensive
B
MOH London
LG818649921 · Nov 1
€2,504 EUR
£2,211 GBP
View
10 more retailers have this diamond
Prices start from €517 EURSave up to €1,986 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
4.01ct Cushion
€517 EUR