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Cushion|Lab Grown|IGI

1.56ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG683597087

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG683597087

Diamond specifications and retailer prices

From $591 CAD
$422 USD
As of October 28, 2026
Save $1,593 CAD (73%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,183 CAD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.56ct lab-grown cushion diamond

This 1.56ct 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 LG683597087 or 683597087. Listed at 8 retailers as of October 28, 2026, with prices from $591 to $2,183, a $1,593 spread on the same certified stone. Brilliant Earth lists it at $2,183. 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

1.56
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683597087
Dimensions6.60 × 6.58 × 4.47 mm
L/W Ratio1.00
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
6.60 mm6.58 mm1.56 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683597087
Side View
Table 62.0%Crown 37.2°Girdle: THN-MEDPavilion 37.1°Culet: NoneDepth 67.9%

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 28
Current: $2,183 CAD|Low: $556 CAD|High: $2,253 CAD|Avg: $1,006 CAD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 6$591 CAD
Retailer 2$619 CAD
Retailer 3$648 CAD
Retailer 8$669 CAD
Retailer 7$701 CAD
Retailer 5$1,232 CAD
Retailer 4$1,586 CAD
Brilliant Earth$2,183 CAD

41 data points across 8 retailers

8 retailers$591 CAD to $2,183 CAD

B+
Cheapest Retailer
-
$591 CAD
$422 USD
A
Retailer 2
-
$619 CAD
£348 GBP
View
A
Retailer 3
-
$648 CAD
€441 EUR
View
A
Retailer 4
-
$669 CAD
$478 USD
View
A
Retailer 5
-
$701 CAD
$501 USD
View
B+
Retailer 6
-
$1,232 CAD
$880 USD
View
Price last confirmed 10 days ago
B
Retailer 7
-
$1,586 CAD
£892 GBP
View
Most Expensive
B
Brilliant Earth
13446550A · Oct 29
$2,183 CAD
$1,560 USD
View
7 more retailers have this diamond
Prices start from $591 CADSave up to $1,593 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
1.56ct Cushion
$591 CAD