CaratHunter
Plans
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 $1,128 SGD
As of November 6, 2026
Save $4,652 SGD (80%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,780 SGD 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 $1,128 to $5,780, a $4,652 spread on the same certified stone. MOH London lists it at $5,780. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,780 SGD|Low: $1,128 SGD|High: $5,872 SGD|Avg: $2,725 SGD|-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$1,128 SGD
Retailer 3$1,555 SGD
Retailer 7$1,692 SGD
Retailer 4$1,803 SGD
Retailer 9$2,548 SGD
Retailer 5$2,859 SGD
Retailer 6$3,381 SGD
Retailer 8$3,455 SGD
MOH London$5,780 SGD

16 data points across 9 retailers

9 retailers$1,128 SGD to $5,780 SGD

A
Cheapest Retailer
-
$1,128 SGD
B+
Retailer 2
-
$1,555 SGD
View
B+
Retailer 3
-
$1,692 SGD
View
Retailer 4
-
$1,803 SGD
View
Price last confirmed 26 days ago
B+
Retailer 5
-
$1,803 SGD
View
B
Retailer 6
-
$2,859 SGD
View
B
Retailer 7
-
$3,381 SGD
View
B
Retailer 8
-
$3,455 SGD
View
Most Expensive
B
MOH London
LG508121542 · Nov 5
$5,780 SGD
£3,551 GBP
View
8 more retailers have this diamond
Prices start from $1,128 SGDSave up to $4,652 SGD

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
$1,128 SGD