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Cushion|Lab Grown|IGI

1.51ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG594359006

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG594359006

Diamond specifications and retailer prices

From $1,240 USD
As of October 31, 2026
2 retailers carry this diamond
Most expensive: $1,240 USD at Brilliant Earth
View at Brilliant Earth

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG594359006 or 594359006. Listed at 2 retailers as of October 31, 2026. 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
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG594359006
Dimensions8.22 × 5.96 × 4.04 mm
L/W Ratio1.38
Girdle conditionFaceted
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
8.22 mm5.96 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG594359006
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 36°Culet: NoneDepth 67.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $1,240 USD|Low: $393 USD|High: $1,710 USD|Avg: $771 USD|+4.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
March 23, 2026
Retailer 3$393 USD
Retailer 2$585 USD
Retailer 4$808 USD
Brilliant Earth$1,240 USD

34 data points across 4 retailers

2 retailers

Retailer 1
-
$808 USD
Most Expensive
B
Brilliant Earth
7947832Y · Oct 31
$1,240 USD
View
1 more retailer has this diamond

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
$1,240 USD