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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 $915 AUD
$641 USD
As of November 2, 2026
Save $5,164 AUD (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,079 AUD 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 $915 to $6,079, a $5,164 spread on the same certified stone. Rare Carat lists it at $6,079. 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

How it works →
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: $6,079 AUD|Low: $915 AUD|High: $10,174 AUD|Avg: $3,420 AUD|-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$915 AUD
Retailer 5$995 AUD
Retailer 14$1,060 AUD
Retailer 16$1,260 AUD
Retailer 2$1,262 AUD
Retailer 15$1,651 AUD
Retailer 10$1,694 AUD
Retailer 12$1,718 AUD
Retailer 4$1,734 AUD
Retailer 3$2,344 AUD
Retailer 13$2,708 AUD
Retailer 17$2,982 AUD
Retailer 11$4,467 AUD
Retailer 8$5,052 AUD
Rare Carat$6,079 AUD
Retailer 7$8,360 AUD
Retailer 9$10,174 AUD

7 data points across 17 retailers

14 retailers$915 AUD to $6,079 AUD

A
Cheapest Retailer
-
$915 AUD
$641 USD
A
Retailer 2
-
$995 AUD
$697 USD
View
A
Retailer 3
-
$1,060 AUD
$743 USD
View
A
Retailer 4
-
$1,260 AUD
HK$6,900 HKD
View
A
Retailer 5
-
$1,262 AUD
£696 GBP
View
B+
Retailer 6
-
$1,651 AUD
$1,157 USD
View
A
Retailer 7
-
$1,694 AUD
£935 GBP
View
B+
Retailer 8
-
$1,718 AUD
€1,147 EUR
View
B+
Retailer 9
-
$1,734 AUD
$1,215 USD
View
B+
Retailer 10
-
$2,344 AUD
$1,643 USD
View
B+
Retailer 11
-
$2,708 AUD
$1,898 USD
View
B
Retailer 12
-
$2,982 AUD
$2,090 USD
View
B
Retailer 13
-
$4,467 AUD
£2,465 GBP
View
Most Expensive
B
Rare Carat
KI5392745KF551 · Nov 1
$6,079 AUD
$4,260 USD
View
13 more retailers have this diamond
Prices start from $915 AUDSave up to $5,164 AUD

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
$915 AUD