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Radiant|Lab Grown|IGI

1.51ct H SI2 Radiant Lab Grown Diamond

ID • H/SI2 • IGI LG508121542

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

Certificate IGI LG508121542

Diamond specifications and retailer prices

From $1,238 CAD
As of November 6, 2026
Save $5,106 CAD (80%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,343 CAD at MOH London · As of November 5, 2026
View at MOH London

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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG508121542 or 508121542. Listed at 9 retailers as of November 5, 2026, with prices from $1,238 to $6,343, a $5,106 spread on the same certified stone. MOH London lists it at $6,343. 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
H
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle28.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508121542
Dimensions7.41 × 5.78 × 3.74 mm
L/W Ratio1.28
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
7.41 mm5.78 mm1.51 ctH / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508121542
Side View
Table 65.5%Crown 37.5°Girdle: Slightly ThickPavilion 28.8°Culet: NoneDepth 64.7%

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 6
Current: $6,343 CAD|Low: $1,238 CAD|High: $6,445 CAD|Avg: $2,991 CAD|-1.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 2$1,238 CAD
Retailer 3$1,706 CAD
Retailer 7$1,857 CAD
Retailer 4$1,979 CAD
Retailer 9$2,796 CAD
Retailer 5$3,138 CAD
Retailer 6$3,711 CAD
Retailer 8$3,792 CAD
MOH London$6,343 CAD

16 data points across 9 retailers

9 retailers$1,238 CAD to $6,343 CAD

A
Cheapest Retailer
-
$1,238 CAD
B+
Retailer 2
-
$1,706 CAD
View
B+
Retailer 3
-
$1,857 CAD
View
Retailer 4
-
$1,979 CAD
View
Price last confirmed 26 days ago
B+
Retailer 5
-
$1,979 CAD
View
B
Retailer 6
-
$3,138 CAD
View
B
Retailer 7
-
$3,711 CAD
View
B
Retailer 8
-
$3,792 CAD
View
Most Expensive
B
MOH London
LG508121542 · Nov 5
$6,343 CAD
£3,551 GBP
View
8 more retailers have this diamond
Prices start from $1,238 CADSave up to $5,106 CAD

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
$1,238 CAD