Radiant|Lab Grown|IGI

4.06ct E SI1 Radiant Lab Grown Diamond

EX • E/SI1 • IGI LG817680753

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG817680753

Diamond specifications and retailer prices

From £707 GBP
€902 EUR
As of October 23, 2026
Save £3,868 GBP (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,575 GBP at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 4.06ct lab-grown radiant diamond

This 4.06ct lab-grown radiant 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 LG817680753 or 817680753. Listed at 14 retailers as of October 23, 2026, with prices from £707 to £4,575, a £3,868 spread on the same certified stone. Brilliant Earth lists it at £4,575. 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

4.06
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle27.2°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817680753
Dimensions11.40 × 7.85 × 5.10 mm
L/W Ratio1.45
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.40 mm7.85 mm4.06 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817680753
Side View
Table 58.0%Crown 27.2°Girdle: ThickPavilion 33.9°Culet: NoneDepth 65.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 23
Current: £4,575 GBP|Low: £287 GBP|High: £4,717 GBP|Avg: £1,164 GBP|-3.0%
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
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Retailer 15
October 23, 2026
Retailer 7£341 GBP
Retailer 10£355 GBP
Retailer 14£382 GBP
Retailer 6£423 GBP
Retailer 13£423 GBP
Retailer 15£567 GBP
Retailer 11£638 GBP
Retailer 8£695 GBP
Retailer 2£707 GBP
Retailer 5£1,042 GBP
Retailer 12£1,137 GBP
Retailer 4£1,383 GBP
Retailer 3£1,433 GBP
Retailer 9£1,562 GBP
Brilliant Earth£4,575 GBP

35 data points across 15 retailers

14 retailers£707 GBP to £4,575 GBP

Retailer 1
-
£341 GBP
$457 USD
Price last confirmed 11 days ago
Retailer 2
-
£355 GBP
View
Price last confirmed 13 days ago
Retailer 3
-
£423 GBP
$567 USD
View
Price last confirmed 14 days ago
Retailer 4
-
£423 GBP
$567 USD
View
Price last confirmed 10 days ago
Retailer 5
-
£567 GBP
$760 USD
View
Price last confirmed 9 days ago
Retailer 6
-
£638 GBP
$855 USD
View
Price last confirmed 8 days ago
Retailer 7
-
£695 GBP
View
Price last confirmed 9 days ago
A
Retailer 8
-
£707 GBP
€902 EUR
View
Retailer 9
-
£1,042 GBP
$1,396 USD
View
Price last confirmed 9 days ago
Retailer 10
-
£1,137 GBP
$1,523 USD
View
Price last confirmed 8 days ago
Retailer 11
-
£1,383 GBP
$1,853 USD
View
Price last confirmed 9 days ago
Retailer 12
-
£1,433 GBP
$1,920 USD
View
Price last confirmed 9 days ago
Retailer 13
-
£1,562 GBP
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
20907183A · Oct 26
£4,575 GBP
$6,130 USD
View
13 more retailers have this diamond
Prices start from £707 GBPSave up to £3,868 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
4.06ct Radiant
£707 GBP