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Cushion|Lab Grown|IGI

1.50ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG648477549

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG648477549

Diamond specifications and retailer prices

From $357 CAD
As of November 6, 2026
Save $256 CAD (42%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,772 CAD at Brilliant Earth · As of October 15, 2026
View at Brilliant Earth

About this 1.5ct lab-grown cushion diamond

This 1.5ct 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 LG648477549 or 648477549. Listed at 8 retailers as of November 6, 2026, with a 72% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.50
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle43.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG648477549
Dimensions7.73 × 6.25 × 4.22 mm
L/W Ratio1.24
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.73 mm6.25 mm1.50 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG648477549
Side View
Table 62.0%Crown 33.7°Girdle: THN-STKPavilion 43.5°Culet: NoneDepth 67.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $1,772 CAD|Low: $281 CAD|High: $1,871 CAD|Avg: $778 CAD|-3.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11$281 CAD
Retailer 2$357 CAD
Retailer 4$491 CAD
Retailer 5$508 CAD
Retailer 9$509 CAD
Retailer 7$515 CAD
Retailer 10$613 CAD
Retailer 3$650 CAD
Retailer 8$1,196 CAD
Retailer 6$1,331 CAD
Brilliant Earth$1,772 CAD

24 data points across 11 retailers

8 retailers$357 CAD to $613 CAD

Retailer 1
-
$281 CAD
Price last confirmed 25 days ago
A
Retailer 2
-
$357 CAD
View
A
Retailer 3
-
$491 CAD
View
A
Retailer 4
-
$508 CAD
View
B+
Retailer 5
-
$509 CAD
View
A
Retailer 6
-
$613 CAD
View
Retailer 7
-
$1,196 CAD
View
Price last confirmed 26 days ago
Most Expensive
Brilliant Earth
13300652A · Oct 15
$1,772 CAD
$1,260 USD
View
Price last confirmed 22 days ago
7 more retailers have this diamond
Prices start from $357 CADSave up to $256 CAD

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
1.50ct Cushion
$357 CAD