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Round|Lab Grown|IGI

4.01ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG727578514

Shape and cutting style on the report: Round brilliant

Certificate IGI LG727578514

Diamond specifications and retailer prices

From £360 GBP
$482 USD
As of October 26, 2026
Save £2,029 GBP (85%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,388 GBP at Brilliant Earth · As of October 24, 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 LG727578514 or 727578514. Listed at 17 retailers as of October 24, 2026, with prices from £360 to £2,388, a £2,029 spread on the same certified stone. Brilliant Earth lists it at £2,388. 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 angle33.3°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG727578514
Dimensions10.29 × 10.26 × 6.20 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.29 mm10.26 mm4.01 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG727578514
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 60.3%

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: Oct 26
Current: £2,388 GBP|Low: £287 GBP|High: £2,455 GBP|Avg: £924 GBP|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 28, 2026
Retailer 9£360 GBP
Retailer 3£402 GBP
Retailer 4£446 GBP
Retailer 10£446 GBP
Retailer 2£552 GBP
Retailer 11£696 GBP
Retailer 5£734 GBP
Retailer 12£752 GBP
Retailer 7£1,013 GBP
Retailer 8£1,041 GBP
Retailer 6£1,864 GBP
Brilliant Earth£2,388 GBP

39 data points across 12 retailers

17 retailers£360 GBP to £2,388 GBP

A
Cheapest Retailer
-
£360 GBP
$482 USD
Retailer 2
-
£403 GBP
$540 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
£446 GBP
$598 USD
View
Retailer 4
-
£446 GBP
$598 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
£552 GBP
$740 USD
View
B+
Retailer 6
-
£696 GBP
$933 USD
View
A
Retailer 7
-
£734 GBP
View
A
Retailer 8
-
£752 GBP
$1,007 USD
View
B+
Retailer 9
-
£917 GBP
$1,229 USD
View
B+
Retailer 10
-
£1,013 GBP
A$2,088 AUD
View
B+
Retailer 11
-
£1,041 GBP
$1,395 USD
View
Retailer 12
-
£1,107 GBP
$1,483 USD
View
Price last confirmed 45 days ago
B
Retailer 13
-
£1,434 GBP
$1,921 USD
View
B
Retailer 14
-
£1,455 GBP
$1,950 USD
View
B
Retailer 15
-
£1,864 GBP
View
Retailer 16
-
£1,880 GBP
$2,518 USD
View
Price last confirmed 96 days ago
Most Expensive
B
Brilliant Earth
15507358A · Oct 24
£2,388 GBP
$3,200 USD
View
16 more retailers have this diamond
Prices start from £360 GBPSave up to £2,029 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
£360 GBP