Radiant|Lab Grown|IGI

5.45ct F SI2 Radiant Lab Grown Diamond

ID • F/SI2 • IGI LG551274539

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

Certificate IGI LG551274539

Diamond specifications and retailer prices

From £478 GBP
$641 USD
As of November 2, 2026
Save £2,701 GBP (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,179 GBP at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 5.45ct lab-grown radiant diamond

This 5.45ct lab-grown radiant sits in the over five carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG551274539 or 551274539. Listed at 14 retailers as of November 1, 2026, with prices from £478 to £3,179, a £2,701 spread on the same certified stone. Rare Carat lists it at £3,179. 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

5.45
Carat
F
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.2°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG551274539
Dimensions12.58 × 8.53 × 5.70 mm
L/W Ratio1.47
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
12.58 mm8.53 mm5.45 ctF / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG551274539
Side View
Table 65.5%Crown 46.2°Girdle: ThickPavilion 34.2°Culet: NoneDepth 66.8%

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: Nov 2
Current: £3,179 GBP|Low: £478 GBP|High: £5,321 GBP|Avg: £1,789 GBP|-11.2%
Rare Carat
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
Retailer 17
November 2, 2026
Retailer 6£478 GBP
Retailer 5£520 GBP
Retailer 14£555 GBP
Retailer 16£659 GBP
Retailer 2£660 GBP
Retailer 15£864 GBP
Retailer 10£886 GBP
Retailer 12£899 GBP
Retailer 4£907 GBP
Retailer 3£1,226 GBP
Retailer 13£1,417 GBP
Retailer 17£1,560 GBP
Retailer 11£2,336 GBP
Retailer 8£2,643 GBP
Rare Carat£3,179 GBP
Retailer 7£4,373 GBP
Retailer 9£5,321 GBP

7 data points across 17 retailers

14 retailers£478 GBP to £3,179 GBP

A
Cheapest Retailer
-
£478 GBP
$641 USD
A
Retailer 2
-
£520 GBP
$697 USD
View
A
Retailer 3
-
£555 GBP
$743 USD
View
A
Retailer 4
-
£659 GBP
HK$6,900 HKD
View
A
Retailer 5
-
£660 GBP
View
B+
Retailer 6
-
£864 GBP
$1,157 USD
View
A
Retailer 7
-
£886 GBP
View
B+
Retailer 8
-
£899 GBP
€1,147 EUR
View
B+
Retailer 9
-
£907 GBP
$1,215 USD
View
B+
Retailer 10
-
£1,226 GBP
$1,643 USD
View
B+
Retailer 11
-
£1,417 GBP
$1,898 USD
View
B
Retailer 12
-
£1,560 GBP
$2,090 USD
View
B
Retailer 13
-
£2,336 GBP
View
Most Expensive
B
Rare Carat
KI5392745KF551 · Nov 1
£3,179 GBP
$4,260 USD
View
13 more retailers have this diamond
Prices start from £478 GBPSave up to £2,701 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
5.45ct Radiant
£478 GBP