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 $348 USD
As of November 6, 2026
Save $882 USD (72%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,230 USD 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 $348 to $1,230, a $882 spread on the same certified stone. Brilliant Earth lists it at $1,230. 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
Color
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: $1,230 USD|Low: $183 USD|High: $1,460 USD|Avg: $701 USD|-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$183 USD
Retailer 2$348 USD
Retailer 9$359 USD
Retailer 11$368 USD
Retailer 8$369 USD
Retailer 6$490 USD
Retailer 12$528 USD
Retailer 3$541 USD
Retailer 13$711 USD
Retailer 10$956 USD
Retailer 7$1,015 USD
Retailer 5$1,081 USD
Brilliant Earth$1,230 USD

35 data points across 13 retailers

16 retailers$348 USD to $1,230 USD

Retailer 1
-
$233 USD
Price last confirmed 30 days ago
Retailer 2
-
$270 USD
View
Price last confirmed 41 days ago
Retailer 3
-
$289 USD
View
Price last confirmed 35 days ago
A
Retailer 4
-
$348 USD
View
Retailer 5
-
$359 USD
View
Price last confirmed 11 days ago
Retailer 6
-
$368 USD
View
Price last confirmed 13 days ago
Retailer 7
-
$369 USD
View
Price last confirmed 10 days ago
A
Retailer 8
-
$490 USD
View
A
Retailer 9
-
$528 USD
View
Retailer 10
-
$541 USD
View
Price last confirmed 12 days ago
Retailer 11
-
$711 USD
View
Price last confirmed 11 days ago
Retailer 12
-
$930 USD
View
Price last confirmed 38 days ago
Retailer 13
-
$956 USD
View
Price last confirmed 13 days ago
Retailer 14
-
$1,015 USD
View
Price last confirmed 10 days ago
Retailer 15
-
$1,081 USD
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
15840212A · Nov 6
$1,230 USD
View
15 more retailers have this diamond
Prices start from $348 USDSave up to $882 USD

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
$348 USD