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Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG775629456

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

Certificate IGI LG775629456

Diamond specifications and retailer prices

From $278 CAD
$199 USD
As of October 30, 2026
Save $1,314 CAD (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,592 CAD at Brilliant Earth · As of October 30, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG775629456 or 775629456. Listed at 12 retailers as of October 30, 2026, with prices from $278 to $1,592, a $1,314 spread on the same certified stone. Brilliant Earth lists it at $1,592. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.1°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG775629456
Dimensions6.71 × 6.60 × 4.07 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.71 mm6.60 mm1.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG775629456
Side View
Table 65.0%Crown 32.1°Girdle: MED-STKPavilion 34.6°Culet: NoneDepth 61.7%

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: Oct 30
Current: $1,592 CAD|Low: $278 CAD|High: $1,760 CAD|Avg: $753 CAD|-8.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 8$278 CAD
Retailer 3$327 CAD
Retailer 9$546 CAD
Retailer 2$548 CAD
Retailer 4$573 CAD
Retailer 11$575 CAD
Retailer 6$668 CAD
Retailer 7$671 CAD
Retailer 5$772 CAD
Retailer 10$1,064 CAD
Retailer 12$1,536 CAD
Brilliant Earth$1,592 CAD

45 data points across 12 retailers

12 retailers$278 CAD to $1,592 CAD

A
Cheapest Retailer
-
$278 CAD
$199 USD
Final sale: no returns
A
Retailer 2
-
$327 CAD
$234 USD
View
B+
Retailer 3
-
$546 CAD
$391 USD
View
A
Retailer 4
-
$548 CAD
£309 GBP
View
Retailer 5
-
$573 CAD
£323 GBP
View
Price last confirmed 17 days ago
A
Retailer 6
-
$575 CAD
€392 EUR
View
A
Retailer 7
-
$668 CAD
$478 USD
View
A
Retailer 8
-
$671 CAD
$480 USD
View
B+
Retailer 9
-
$772 CAD
$553 USD
View
B+
Retailer 10
-
$1,064 CAD
$762 USD
View
B
Retailer 11
-
$1,536 CAD
£866 GBP
View
Most Expensive
B
Brilliant Earth
17807477A · Oct 30
$1,592 CAD
$1,140 USD
View
11 more retailers have this diamond
Prices start from $278 CADSave up to $1,314 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
$278 CAD