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Cushion|Lab Grown|IGI

1.51ct G SI2 Cushion Lab Grown Diamond

ID • G/SI2 • IGI LG520200135

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG520200135

Diamond specifications and retailer prices

From $878 NZD
$495 USD
As of November 1, 2026
Save $1,418 NZD (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $2,296 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG520200135 or 520200135. Listed at 7 retailers as of November 1, 2026, with prices from $878 to $2,296, a $1,418 spread on the same certified stone. MOH London lists it at $2,296. 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
G
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG520200135
Dimensions6.58 × 6.48 × 4.52 mm
L/W Ratio1.02
Girdle conditionFaceted
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
6.58 mm6.48 mm1.51 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG520200135
Side View
Table 62.0%Crown 40.2°Girdle: STK-VTKPavilion 40°Culet: NoneDepth 69.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $2,296 NZD|Low: $410 NZD|High: $2,310 NZD|Avg: $1,287 NZD|+8.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 4$520 NZD
Retailer 5$878 NZD
Retailer 2$1,096 NZD
Retailer 3$1,098 NZD
Retailer 6$1,437 NZD
Retailer 7$1,822 NZD
MOH London$2,296 NZD

36 data points across 7 retailers

7 retailers$878 NZD to $2,296 NZD

Retailer 1
-
$520 NZD
$293 USD
Price last confirmed 8 days ago
B+
Retailer 2
-
$878 NZD
$495 USD
View
B+
Retailer 3
-
$1,096 NZD
£486 GBP
View
B+
Retailer 4
-
$1,098 NZD
$619 USD
View
B+
Retailer 5
-
$1,437 NZD
$810 USD
View
B
Retailer 6
-
$1,822 NZD
$1,027 USD
View
Most Expensive
B
MOH London
LG520200135 · Nov 1
$2,296 NZD
£1,019 GBP
View
6 more retailers have this diamond
Prices start from $878 NZDSave up to $1,418 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.

B+
1.51ct Cushion
$878 NZD