CaratHunter
Plans
Round|Lab Grown|IGI

4.01ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG671467303

Shape and cutting style on the report: Round brilliant

Certificate IGI LG671467303

Diamond specifications and retailer prices

From £590 GBP
$790 USD
As of October 31, 2026
Save £2,276 GBP (79%) vs most expensive(unlock to see where)
15 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 LG671467303 or 671467303. Listed at 15 retailers as of October 29, 2026, with prices from £590 to £2,866, a £2,276 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 angle35.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG671467303
Dimensions10.18 × 10.15 × 6.29 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.18 mm10.15 mm4.01 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG671467303
Side View
Table 57.0%Crown 35.1°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £2,866 GBP|Low: £417 GBP|High: £3,217 GBP|Avg: £1,089 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
October 31, 2026
Retailer 4£417 GBP
Retailer 3£541 GBP
Retailer 5£590 GBP
Retailer 6£677 GBP
Retailer 2£757 GBP
Retailer 12£758 GBP
Retailer 10£784 GBP
Retailer 11£929 GBP
Retailer 8£1,264 GBP
Retailer 9£1,698 GBP
Retailer 7£2,055 GBP
Brilliant Earth£2,866 GBP

36 data points across 12 retailers

15 retailers£590 GBP to £2,866 GBP

Retailer 1
-
£337 GBP
$451 USD
Price last confirmed 38 days ago
Retailer 2
-
£377 GBP
$505 USD
View
Price last confirmed 37 days ago
Retailer 3
-
£412 GBP
$552 USD
View
Price last confirmed 34 days ago
Retailer 4
-
£541 GBP
View
Price last confirmed 23 days ago
A
Retailer 5
-
£590 GBP
$790 USD
View
A
Retailer 6
-
£677 GBP
€864 EUR
View
B+
Retailer 7
-
£757 GBP
View
B+
Retailer 8
-
£758 GBP
$1,015 USD
View
B+
Retailer 9
-
£784 GBP
$1,050 USD
View
B+
Retailer 10
-
£929 GBP
$1,245 USD
View
B+
Retailer 11
-
£1,264 GBP
$1,693 USD
View
Retailer 12
-
£1,341 GBP
$1,797 USD
View
Price last confirmed 34 days ago
Retailer 13
-
£1,698 GBP
$2,275 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
£2,055 GBP
View
Most Expensive
B
Brilliant Earth
12676925A · Oct 29
£2,866 GBP
$3,840 USD
View
14 more retailers have this diamond
Prices start from £590 GBPSave up to £2,276 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
£590 GBP