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Cushion|Lab Grown|IGI

1.65ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG541252029

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG541252029

Diamond specifications and retailer prices

From $315 CAD
$225 USD
As of October 30, 2026
Save $1,756 CAD (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,071 CAD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.65ct lab-grown cushion diamond

This 1.65ct 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 LG541252029 or 541252029. Listed at 14 retailers as of October 29, 2026, with prices from $315 to $2,071, a $1,756 spread on the same certified stone. Brilliant Earth lists it at $2,071. 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

1.65
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle32.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG541252029
Dimensions6.74 × 6.63 × 4.20 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
6.74 mm6.63 mm1.65 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG541252029
Side View
Table 64.0%Crown 34.5°Girdle: MED-VTKPavilion 32.5°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: $2,071 CAD|Low: $315 CAD|High: $2,211 CAD|Avg: $917 CAD|-6.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 11$315 CAD
Retailer 9$351 CAD
Retailer 6$476 CAD
Retailer 4$578 CAD
Retailer 2$645 CAD
Retailer 3$711 CAD
Retailer 10$823 CAD
Retailer 8$900 CAD
Retailer 7$1,463 CAD
Retailer 5$1,651 CAD
Brilliant Earth$2,071 CAD

44 data points across 11 retailers

14 retailers$315 CAD to $2,071 CAD

A
Cheapest Retailer
-
$315 CAD
$225 USD
Final sale: no returns
A
Retailer 2
-
$351 CAD
$251 USD
View
B+
Retailer 3
-
$476 CAD
$340 USD
View
A
Retailer 4
-
$578 CAD
€393 EUR
View
A
Retailer 5
-
$645 CAD
£363 GBP
View
A
Retailer 6
-
$711 CAD
$508 USD
View
A
Retailer 7
-
$801 CAD
$572 USD
View
A
Retailer 8
-
$823 CAD
$588 USD
View
B+
Retailer 9
-
$900 CAD
$643 USD
View
B+
Retailer 10
-
$1,204 CAD
$860 USD
View
Retailer 11
-
$1,463 CAD
$1,045 USD
View
Price last confirmed 8 days ago
B
Retailer 12
-
$1,651 CAD
£929 GBP
View
B
Retailer 13
-
$1,681 CAD
$1,201 USD
View
Most Expensive
B
Brilliant Earth
10789223A · Oct 29
$2,071 CAD
$1,480 USD
View
13 more retailers have this diamond
Prices start from $315 CADSave up to $1,756 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
1.65ct Cushion
$315 CAD