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Cushion|Lab Grown|IGI

1.64ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG526266176

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG526266176

Diamond specifications and retailer prices

From $418 CAD
$299 USD
As of October 28, 2026
Save $2,563 CAD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,981 CAD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.64ct lab-grown cushion diamond

This 1.64ct 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 LG526266176 or 526266176. Listed at 13 retailers as of October 28, 2026, with prices from $418 to $2,981, a $2,563 spread on the same certified stone. Brilliant Earth lists it at $2,981. 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

1.64
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG526266176
Dimensions6.98 × 6.76 × 4.43 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
6.98 mm6.76 mm1.64 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG526266176
Side View
Table 65.5%Crown 35.7°Girdle: MED-VTKPavilion 39.3°Culet: NoneDepth 65.5%

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: $2,981 CAD|Low: $297 CAD|High: $2,981 CAD|Avg: $1,086 CAD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 13$418 CAD
Retailer 11$463 CAD
Retailer 12$619 CAD
Retailer 8$623 CAD
Retailer 4$824 CAD
Retailer 6$830 CAD
Retailer 3$837 CAD
Retailer 2$887 CAD
Retailer 10$1,170 CAD
Retailer 9$1,505 CAD
Retailer 5$1,559 CAD
Retailer 7$1,865 CAD
Brilliant Earth$2,981 CAD

43 data points across 13 retailers

13 retailers$418 CAD to $2,981 CAD

A
Cheapest Retailer
-
$418 CAD
$299 USD
Final sale: no returns
A
Retailer 2
-
$463 CAD
$331 USD
View
B+
Retailer 3
-
$619 CAD
$442 USD
View
A
Retailer 4
-
$623 CAD
$445 USD
View
A
Retailer 5
-
$824 CAD
$589 USD
View
A
Retailer 6
-
$830 CAD
€565 EUR
View
B+
Retailer 7
-
$837 CAD
$598 USD
View
B+
Retailer 8
-
$887 CAD
£499 GBP
View
B+
Retailer 9
-
$1,170 CAD
$836 USD
View
Retailer 10
-
$1,505 CAD
$1,075 USD
View
Price last confirmed 8 days ago
B
Retailer 11
-
$1,559 CAD
$1,114 USD
View
B
Retailer 12
-
$1,865 CAD
£1,049 GBP
View
Most Expensive
B
Brilliant Earth
11226038A · Oct 29
$2,981 CAD
$2,130 USD
View
12 more retailers have this diamond
Prices start from $418 CADSave up to $2,563 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
1.64ct Cushion
$418 CAD