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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG726545903

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG726545903

Diamond specifications and retailer prices

From $260 USD
As of November 6, 2026
Save $1,430 USD (85%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,690 USD at Brilliant Earth · As of November 6, 2026
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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG726545903 or 726545903. Listed at 11 retailers as of November 6, 2026, with prices from $260 to $1,690, a $1,430 spread on the same certified stone. Brilliant Earth lists it at $1,690. 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 angle28.9°
Pavilion angle30.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG726545903
Dimensions8.56 × 5.76 × 3.49 mm
L/W Ratio1.49
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.56 mm5.76 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG726545903
Side View
Table 60.0%Crown 28.9°Girdle: MED-THKPavilion 30.9°Culet: LargeDepth 60.6%

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: Nov 6
Current: $1,690 USD|Low: $260 USD|High: $1,690 USD|Avg: $664 USD|+49.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9$260 USD
Retailer 7$289 USD
Retailer 5$390 USD
Retailer 2$479 USD
Retailer 3$540 USD
Retailer 8$616 USD
Retailer 6$890 USD
Retailer 10$981 USD
Retailer 4$1,155 USD
Brilliant Earth$1,690 USD

43 data points across 10 retailers

11 retailers$260 USD to $1,690 USD

A
Cheapest Retailer
-
$260 USD
Final sale: no returns
Retailer 2
-
$289 USD
View
Price last confirmed 12 days ago
B+
Retailer 3
-
$390 USD
View
A
Retailer 4
-
$466 USD
View
A
Retailer 5
-
$479 USD
View
A
Retailer 6
-
$540 USD
View
B+
Retailer 7
-
$616 USD
View
Retailer 8
-
$890 USD
View
Price last confirmed 16 days ago
B
Retailer 9
-
$981 USD
View
B
Retailer 10
-
$1,155 USD
View
Most Expensive
B
Brilliant Earth
20664776A · Nov 6
$1,690 USD
View
10 more retailers have this diamond
Prices start from $260 USDSave up to $1,430 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
$260 USD