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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 $1,703 NZD
$960 USD
As of October 31, 2026
Save $6,767 NZD (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $8,470 NZD at MOH London · As of November 1, 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 31, 2026, with prices from $1,703 to $8,470, a $6,767 spread on the same certified stone. MOH London lists it at $8,470. 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
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

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: Oct 31
Current: $8,470 NZD|Low: $1,703 NZD|High: $8,583 NZD|Avg: $4,237 NZD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 2$1,703 NZD
Retailer 3$2,557 NZD
Retailer 4$2,967 NZD
Retailer 7$3,274 NZD
Retailer 9$3,403 NZD
Retailer 8$4,033 NZD
Retailer 5$4,679 NZD
Retailer 6$5,383 NZD
MOH London$8,470 NZD

14 data points across 9 retailers

10 retailers$1,703 NZD to $8,470 NZD

A
Cheapest Retailer
-
$1,703 NZD
$960 USD
B+
Retailer 2
-
$2,557 NZD
$1,441 USD
View
B+
Retailer 3
-
$2,782 NZD
$1,568 USD
View
Retailer 4
-
$2,967 NZD
$1,672 USD
View
Price last confirmed 20 days ago
B+
Retailer 5
-
$2,967 NZD
$1,672 USD
View
B+
Retailer 6
-
$3,274 NZD
$1,845 USD
View
B
Retailer 7
-
$4,679 NZD
$2,637 USD
View
B
Retailer 8
-
$5,383 NZD
$3,034 USD
View
B
Retailer 9
-
$5,559 NZD
$3,133 USD
View
Most Expensive
B
MOH London
LG512224088 · Nov 1
$8,470 NZD
£3,759 GBP
View
9 more retailers have this diamond
Prices start from $1,703 NZDSave up to $6,767 NZD

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
$1,703 NZD