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Radiant|Lab Grown|IGI

5.03ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG618450557

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

Certificate IGI LG618450557

Diamond specifications and retailer prices

From £372 GBP
$499 USD
As of October 30, 2026
Save £2,755 GBP (88%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,127 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 5.03ct lab-grown radiant diamond

This 5.03ct lab-grown radiant sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG618450557 or 618450557. Listed at 16 retailers as of October 30, 2026, with prices from £372 to £3,127, a £2,755 spread on the same certified stone. Brilliant Earth lists it at £3,127. 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

5.03
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618450557
Dimensions12.15 × 8.35 × 5.72 mm
L/W Ratio1.46
Culet sizePointed
Top View
12.15 mm8.35 mm5.03 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618450557
Side View
Table 65.0%Crown 45°Girdle: MediumPavilion 35.7°Culet: NoneDepth 68.5%

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 30
Current: £3,127 GBP|Low: £372 GBP|High: £3,784 GBP|Avg: £1,136 GBP|-17.4%
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 30, 2026
Retailer 15£372 GBP
Retailer 10£417 GBP
Retailer 3£462 GBP
Retailer 5£462 GBP
Retailer 14£486 GBP
Retailer 4£698 GBP
Retailer 6£718 GBP
Retailer 2£769 GBP
Retailer 13£791 GBP
Retailer 7£796 GBP
Retailer 11£1,193 GBP
Retailer 16£1,216 GBP
Retailer 8£1,475 GBP
Retailer 9£1,939 GBP
Retailer 12£2,190 GBP
Brilliant Earth£3,127 GBP

38 data points across 16 retailers

16 retailers£372 GBP to £3,127 GBP

A
Cheapest Retailer
-
£372 GBP
$499 USD
A
Retailer 2
-
£417 GBP
$559 USD
View
A
Retailer 3
-
£462 GBP
$619 USD
View
Retailer 4
-
£462 GBP
$619 USD
View
Price last confirmed 14 days ago
Retailer 5
-
£486 GBP
View
Price last confirmed 14 days ago
A
Retailer 6
-
£698 GBP
$935 USD
View
B+
Retailer 7
-
£718 GBP
$962 USD
View
A
Retailer 8
-
£769 GBP
View
Retailer 9
-
£791 GBP
€1,009 EUR
View
Price last confirmed 7 days ago
A
Retailer 10
-
£796 GBP
$1,067 USD
View
B+
Retailer 11
-
£1,193 GBP
$1,598 USD
View
B+
Retailer 12
-
£1,216 GBP
$1,629 USD
View
B+
Retailer 13
-
£1,475 GBP
$1,976 USD
View
B
Retailer 14
-
£1,939 GBP
View
B
Retailer 15
-
£2,190 GBP
$2,935 USD
View
Most Expensive
B
Brilliant Earth
9016856A · Oct 30
£3,127 GBP
$4,190 USD
View
15 more retailers have this diamond
Prices start from £372 GBPSave up to £2,755 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
5.03ct Radiant
£372 GBP