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Round|Lab Grown|IGI

4.01ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG640419749

Shape and cutting style on the report: Round brilliant

Certificate IGI LG640419749

Diamond specifications and retailer prices

From £337 GBP
$451 USD
As of October 29, 2026
Save £2,529 GBP (88%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £2,866 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.01ct lab-grown round diamond

This 4.01ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG640419749 or 640419749. Listed at 16 retailers as of October 29, 2026, with prices from £337 to £2,866, a £2,529 spread on the same certified stone. Brilliant Earth lists it at £2,866. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640419749
Dimensions10.21 × 10.27 × 6.22 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
10.21 mm10.27 mm4.01 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640419749
Side View
Table 57.0%Crown 34.2°Girdle: MediumPavilion 40.5°Culet: NoneDepth 60.7%

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: Oct 29
Current: £2,866 GBP|Low: £337 GBP|High: £3,217 GBP|Avg: £939 GBP|-10.9%
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
Retailer 15
Retailer 16
October 31, 2026
Retailer 4£337 GBP
Retailer 12£377 GBP
Retailer 3£417 GBP
Retailer 16£417 GBP
Retailer 9£522 GBP
Retailer 15£537 GBP
Retailer 6£655 GBP
Retailer 2£676 GBP
Retailer 10£688 GBP
Retailer 7£725 GBP
Retailer 8£909 GBP
Retailer 13£1,121 GBP
Retailer 5£1,341 GBP
Retailer 11£1,540 GBP
Retailer 14£1,698 GBP
Brilliant Earth£2,866 GBP

40 data points across 16 retailers

16 retailers£337 GBP to £2,866 GBP

A
Cheapest Retailer
-
£337 GBP
$451 USD
A
Retailer 2
-
£377 GBP
$505 USD
View
A
Retailer 3
-
£417 GBP
$559 USD
View
Retailer 4
-
£417 GBP
$559 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
£522 GBP
$700 USD
View
Retailer 6
-
£537 GBP
View
Price last confirmed 14 days ago
B+
Retailer 7
-
£655 GBP
$877 USD
View
A
Retailer 8
-
£676 GBP
€862 EUR
View
A
Retailer 9
-
£688 GBP
View
A
Retailer 10
-
£725 GBP
$971 USD
View
B+
Retailer 11
-
£909 GBP
$1,218 USD
View
B+
Retailer 12
-
£1,121 GBP
$1,502 USD
View
B+
Retailer 13
-
£1,341 GBP
$1,797 USD
View
B
Retailer 14
-
£1,540 GBP
View
Retailer 15
-
£1,698 GBP
$2,275 USD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
10688124A · Oct 29
£2,866 GBP
$3,840 USD
View
15 more retailers have this diamond
Prices start from £337 GBPSave up to £2,529 GBP

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 Round
£337 GBP