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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG771601186

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

Certificate IGI LG771601186

Diamond specifications and retailer prices

From $243 USD
As of November 6, 2026
Save $768 USD (76%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,011 USD at MOH London · As of November 5, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG771601186 or 771601186. Listed at 9 retailers as of November 5, 2026, with prices from $243 to $1,011, a $768 spread on the same certified stone. MOH London lists it at $1,011. 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
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771601186
Dimensions6.73 × 6.69 × 4.33 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.73 mm6.69 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771601186
Side View
Table 64.0%Crown 32.6°Girdle: MED-STKPavilion 39°Culet: NoneDepth 64.7%

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: Nov 6
Current: $1,011 USD|Low: $243 USD|High: $1,013 USD|Avg: $482 USD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8$243 USD
Retailer 4$275 USD
Retailer 2$374 USD
Retailer 5$383 USD
Retailer 9$386 USD
Retailer 10$391 USD
Retailer 7$446 USD
Retailer 3$493 USD
Retailer 6$740 USD
Retailer 11$890 USD
MOH London$1,011 USD

10 data points across 11 retailers

9 retailers$243 USD to $1,011 USD

A
Cheapest Retailer
-
$243 USD
A
Retailer 2
-
$275 USD
View
A
Retailer 3
-
$374 USD
View
A
Retailer 4
-
$383 USD
View
B+
Retailer 5
-
$386 USD
View
Retailer 6
-
$391 USD
View
Price last confirmed 7 days ago
A
Retailer 7
-
$446 USD
View
B+
Retailer 8
-
$740 USD
View
Most Expensive
B
MOH London
LG771601186 · Nov 5
$1,011 USD
£796 GBP
View
8 more retailers have this diamond
Prices start from $243 USDSave up to $768 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 Cushion
$243 USD