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Radiant|Lab Grown|IGI

1.51ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG512224088

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

Certificate IGI LG512224088

Diamond specifications and retailer prices

From $960 USD
As of October 30, 2026
Save $3,839 USD (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,799 USD at MOH London · As of October 29, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512224088 or 512224088. Listed at 10 retailers as of October 29, 2026, with prices from $960 to $4,799, a $3,839 spread on the same certified stone. MOH London lists it at $4,799. 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
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle31.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512224088
Dimensions8.30 × 5.72 × 3.62 mm
L/W Ratio1.45
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
8.30 mm5.72 mm1.51 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512224088
Side View
Table 64.0%Crown 44.1°Girdle: Slightly ThickPavilion 31.2°Culet: NoneDepth 63.3%

Caratlytics Score

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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: Oct 30
Current: $4,799 USD|Low: $960 USD|High: $4,837 USD|Avg: $2,396 USD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2$960 USD
Retailer 3$1,441 USD
Retailer 4$1,672 USD
Retailer 7$1,845 USD
Retailer 9$1,918 USD
Retailer 8$2,273 USD
Retailer 5$2,637 USD
Retailer 6$3,034 USD
MOH London$4,799 USD

13 data points across 9 retailers

10 retailers$960 USD to $4,799 USD

A
Cheapest Retailer
-
$960 USD
B+
Retailer 2
-
$1,441 USD
View
B+
Retailer 3
-
$1,568 USD
View
Retailer 4
-
$1,672 USD
View
Price last confirmed 18 days ago
B+
Retailer 5
-
$1,672 USD
View
B+
Retailer 6
-
$1,845 USD
View
B
Retailer 7
-
$2,637 USD
View
B
Retailer 8
-
$3,034 USD
View
B
Retailer 9
-
$3,133 USD
View
Most Expensive
B
MOH London
LG512224088 · Oct 29
$4,799 USD
£3,779 GBP
View
9 more retailers have this diamond
Prices start from $960 USDSave up to $3,839 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
$960 USD