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Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG623451210

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG623451210

Diamond specifications and retailer prices

From $420 CAD
$301 USD
As of October 30, 2026
Save $2,918 CAD (87%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,339 CAD at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

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 LG623451210 or 623451210. Listed at 12 retailers as of October 30, 2026, with prices from $420 to $3,339, a $2,918 spread on the same certified stone. Do Amore Diamonds lists it at $3,339. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623451210
Dimensions6.90 × 6.68 × 4.23 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.90 mm6.68 mm1.50 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623451210
Side View
Table 60.0%Crown 36.9°Girdle: MED-STKPavilion 36.7°Culet: NoneDepth 63.3%

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: Oct 30
Current: $3,339 CAD|Low: $420 CAD|High: $3,646 CAD|Avg: $1,406 CAD|-8.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 7$420 CAD
Retailer 6$467 CAD
Retailer 3$552 CAD
Retailer 5$576 CAD
Retailer 10$615 CAD
Retailer 11$623 CAD
Retailer 2$914 CAD
Retailer 8$1,973 CAD
Retailer 4$2,076 CAD
Retailer 9$2,780 CAD
Do Amore Diamonds$3,339 CAD

40 data points across 11 retailers

12 retailers$420 CAD to $3,339 CAD

A
Cheapest Retailer
-
$420 CAD
$301 USD
Final sale: no returns
A
Retailer 2
-
$467 CAD
$334 USD
View
A
Retailer 3
-
$552 CAD
$395 USD
View
Retailer 4
-
$576 CAD
£325 GBP
View
Price last confirmed 14 days ago
A
Retailer 5
-
$615 CAD
$440 USD
View
B+
Retailer 6
-
$623 CAD
$446 USD
View
A
Retailer 7
-
$691 CAD
$495 USD
View
B+
Retailer 8
-
$914 CAD
£515 GBP
View
B
Retailer 9
-
$1,886 CAD
$1,350 USD
View
B
Retailer 10
-
$1,973 CAD
$1,413 USD
View
B
Retailer 11
-
$2,076 CAD
£1,170 GBP
View
Most Expensive
B
Do Amore Diamonds
27-26C7668BD · Oct 30
$3,339 CAD
$2,390 USD
View
11 more retailers have this diamond
Prices start from $420 CADSave up to $2,918 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
$420 CAD