Radiant|Lab Grown|IGI

4.07ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG839645230

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

Certificate IGI LG839645230

Diamond specifications and retailer prices

From £644 GBP
$863 USD
As of October 30, 2026
Save £1,671 GBP (72%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £4,732 GBP at Brilliant Earth · As of October 1, 2026
View at Brilliant Earth

About this 4.07ct lab-grown radiant diamond

This 4.07ct 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 LG839645230 or 839645230. Listed at 9 retailers as of October 29, 2026, with a 259% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

4.07
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.1°
Pavilion angle32.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839645230
Dimensions11.82 × 7.94 × 5.09 mm
L/W Ratio1.49
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.82 mm7.94 mm4.07 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839645230
Side View
Table 63.0%Crown 38.1°Girdle: MediumPavilion 32.1°Culet: NoneDepth 64.1%

Caratlytics Score

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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 30
Current: £4,732 GBP|Low: £644 GBP|High: £4,732 GBP|Avg: £1,944 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 23, 2026
Retailer 5£644 GBP
Retailer 2£780 GBP
Retailer 6£837 GBP
Retailer 4£1,215 GBP
Retailer 8£1,511 GBP
Retailer 9£1,843 GBP
Retailer 7£1,849 GBP
Retailer 3£2,315 GBP
Brilliant Earth£4,732 GBP

11 data points across 9 retailers

9 retailers£644 GBP to £2,315 GBP

B+
Cheapest Retailer
-
£644 GBP
$863 USD
Retailer 2
-
£780 GBP
€995 EUR
View
Price last confirmed 7 days ago
A
Retailer 3
-
£837 GBP
$1,121 USD
View
B+
Retailer 4
-
£1,215 GBP
$1,628 USD
View
B+
Retailer 5
-
£1,511 GBP
$2,024 USD
View
B
Retailer 6
-
£1,843 GBP
$2,470 USD
View
B
Retailer 7
-
£1,849 GBP
SGD 3,348 SGD
View
B
Retailer 8
-
£2,315 GBP
$3,102 USD
View
Most Expensive
Brilliant Earth
21597794A · Oct 1
£4,732 GBP
$6,340 USD
View
Price last confirmed 29 days ago
8 more retailers have this diamond
Prices start from £644 GBPSave up to £1,671 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
4.07ct Radiant
£644 GBP