Radiant|Lab Grown|IGI

1.51ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG732564144

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

Certificate IGI LG732564144

Diamond specifications and retailer prices

From $506 AUD
As of November 6, 2026
Save $1,284 AUD (72%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,790 AUD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG732564144 or 732564144. Listed at 16 retailers as of November 6, 2026, with prices from $506 to $1,790, a $1,284 spread on the same certified stone. Brilliant Earth lists it at $1,790. 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

1.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.1°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG732564144
Dimensions8.20 × 5.71 × 3.76 mm
L/W Ratio1.44
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.20 mm5.71 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG732564144
Side View
Table 68.0%Crown 42.1°Girdle: MED-STKPavilion 33.9°Culet: NoneDepth 65.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $1,790 AUD|Low: $266 AUD|High: $2,125 AUD|Avg: $1,020 AUD|-4.7%
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
November 6, 2026
Retailer 4$266 AUD
Retailer 2$506 AUD
Retailer 9$522 AUD
Retailer 11$536 AUD
Retailer 8$537 AUD
Retailer 6$713 AUD
Retailer 12$768 AUD
Retailer 3$787 AUD
Retailer 13$1,035 AUD
Retailer 10$1,391 AUD
Retailer 7$1,477 AUD
Retailer 5$1,573 AUD
Brilliant Earth$1,790 AUD

35 data points across 13 retailers

16 retailers$506 AUD to $1,790 AUD

Retailer 1
-
$339 AUD
Price last confirmed 30 days ago
Retailer 2
-
$393 AUD
View
Price last confirmed 41 days ago
Retailer 3
-
$421 AUD
View
Price last confirmed 35 days ago
A
Retailer 4
-
$506 AUD
View
Retailer 5
-
$522 AUD
View
Price last confirmed 11 days ago
Retailer 6
-
$536 AUD
View
Price last confirmed 13 days ago
Retailer 7
-
$537 AUD
View
Price last confirmed 10 days ago
A
Retailer 8
-
$713 AUD
View
A
Retailer 9
-
$768 AUD
View
Retailer 10
-
$787 AUD
View
Price last confirmed 12 days ago
Retailer 11
-
$1,035 AUD
View
Price last confirmed 11 days ago
Retailer 12
-
$1,354 AUD
View
Price last confirmed 38 days ago
Retailer 13
-
$1,391 AUD
View
Price last confirmed 13 days ago
Retailer 14
-
$1,477 AUD
View
Price last confirmed 10 days ago
Retailer 15
-
$1,573 AUD
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
15840212A · Nov 6
$1,790 AUD
$1,230 USD
View
15 more retailers have this diamond
Prices start from $506 AUDSave up to $1,284 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
1.51ct Radiant
$506 AUD