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Cushion|Lab Grown|IGI

1.66ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG532262653

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG532262653

Diamond specifications and retailer prices

From $422 CAD
$302 USD
As of November 1, 2026
Save $1,799 CAD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,221 CAD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.66ct lab-grown cushion diamond

This 1.66ct 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 LG532262653 or 532262653. Listed at 14 retailers as of October 31, 2026, with prices from $422 to $2,221, a $1,799 spread on the same certified stone. Brilliant Earth lists it at $2,221. 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

1.66
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG532262653
Dimensions7.05 × 6.85 × 4.46 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
7.05 mm6.85 mm1.66 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG532262653
Side View
Table 65.0%Crown 35.4°Girdle: MED-THKPavilion 38.9°Culet: NoneDepth 65.1%

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: Nov 1
Current: $2,221 CAD|Low: $416 CAD|High: $2,235 CAD|Avg: $992 CAD|-0.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 3$422 CAD
Retailer 11$467 CAD
Retailer 2$520 CAD
Retailer 12$626 CAD
Retailer 8$629 CAD
Retailer 5$820 CAD
Retailer 6$833 CAD
Retailer 4$841 CAD
Retailer 10$1,183 CAD
Retailer 9$1,509 CAD
Retailer 7$1,881 CAD
Brilliant Earth$2,221 CAD

44 data points across 12 retailers

14 retailers$422 CAD to $2,221 CAD

A
Cheapest Retailer
-
$422 CAD
$302 USD
Final sale: no returns
Retailer 2
-
$467 CAD
$334 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$520 CAD
£293 GBP
View
B+
Retailer 4
-
$626 CAD
$448 USD
View
A
Retailer 5
-
$629 CAD
$450 USD
View
A
Retailer 6
-
$820 CAD
£462 GBP
View
A
Retailer 7
-
$833 CAD
€568 EUR
View
B+
Retailer 8
-
$841 CAD
$602 USD
View
B+
Retailer 9
-
$841 CAD
$602 USD
View
B+
Retailer 10
-
$1,183 CAD
$847 USD
View
Retailer 11
-
$1,509 CAD
$1,080 USD
View
Price last confirmed 11 days ago
B
Retailer 12
-
$1,572 CAD
$1,125 USD
View
B
Retailer 13
-
$1,881 CAD
£1,060 GBP
View
Most Expensive
B
Brilliant Earth
11259540A · Oct 31
$2,221 CAD
$1,590 USD
View
13 more retailers have this diamond
Prices start from $422 CADSave up to $1,799 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
1.66ct Cushion
$422 CAD