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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 $495 USD
As of November 1, 2026
Save $799 USD (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,294 USD 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 $495 to $1,294, a $799 spread on the same certified stone. MOH London lists it at $1,294. 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
Color
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: $1,294 USD|Low: $231 USD|High: $1,302 USD|Avg: $724 USD|+8.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 4$293 USD
Retailer 5$495 USD
Retailer 2$612 USD
Retailer 3$619 USD
Retailer 6$810 USD
Retailer 7$1,027 USD
MOH London$1,294 USD

36 data points across 7 retailers

7 retailers$495 USD to $1,294 USD

Retailer 1
-
$293 USD
Price last confirmed 7 days ago
B+
Retailer 2
-
$495 USD
View
B+
Retailer 3
-
$612 USD
£482 GBP
View
B+
Retailer 4
-
$619 USD
View
B+
Retailer 5
-
$810 USD
View
B
Retailer 6
-
$1,027 USD
View
Most Expensive
B
MOH London
LG520200135 · Nov 1
$1,294 USD
£1,019 GBP
View
6 more retailers have this diamond
Prices start from $495 USDSave up to $799 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.

B+
1.51ct Cushion
$495 USD