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Cushion|Lab Grown|IGI

1.59ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG539216557

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG539216557

Diamond specifications and retailer prices

From $305 CAD
$218 USD
As of October 28, 2026
Save $1,556 CAD (84%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,861 CAD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.59ct lab-grown cushion diamond

This 1.59ct 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 LG539216557 or 539216557. Listed at 12 retailers as of October 28, 2026, with prices from $305 to $1,861, a $1,556 spread on the same certified stone. Brilliant Earth lists it at $1,861. 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

1.59
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG539216557
Dimensions6.48 × 6.35 × 4.35 mm
L/W Ratio1.02
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
6.48 mm6.35 mm1.59 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG539216557
Side View
Table 57.5%Crown 37.3°Girdle: STK-VTKPavilion 32.9°Culet: NoneDepth 68.5%

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: $1,861 CAD|Low: $305 CAD|High: $1,903 CAD|Avg: $860 CAD|-2.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 8$305 CAD
Retailer 5$459 CAD
Retailer 3$561 CAD
Retailer 2$620 CAD
Retailer 9$685 CAD
Retailer 7$809 CAD
Retailer 6$866 CAD
Retailer 4$1,600 CAD
Brilliant Earth$1,861 CAD

43 data points across 9 retailers

12 retailers$305 CAD to $1,861 CAD

A
Cheapest Retailer
-
$305 CAD
$218 USD
Final sale: no returns
B+
Retailer 2
-
$459 CAD
$328 USD
View
A
Retailer 3
-
$561 CAD
€382 EUR
View
A
Retailer 4
-
$620 CAD
£349 GBP
View
A
Retailer 5
-
$685 CAD
$490 USD
View
A
Retailer 6
-
$749 CAD
$535 USD
View
B+
Retailer 7
-
$809 CAD
$578 USD
View
B+
Retailer 8
-
$866 CAD
$619 USD
View
B+
Retailer 9
-
$1,169 CAD
$835 USD
View
B
Retailer 10
-
$1,600 CAD
£900 GBP
View
B
Retailer 11
-
$1,653 CAD
$1,181 USD
View
Most Expensive
B
Brilliant Earth
10789149A · Oct 29
$1,861 CAD
$1,330 USD
View
11 more retailers have this diamond
Prices start from $305 CADSave up to $1,556 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
1.59ct Cushion
$305 CAD