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Cushion|Lab Grown|IGI

1.51ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG728533556

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG728533556

Diamond specifications and retailer prices

From $723 CAD
$517 USD
As of November 3, 2026
Save $3,456 CAD (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $4,179 CAD at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG728533556 or 728533556. Listed at 19 retailers as of November 3, 2026, with prices from $723 to $4,179, a $3,456 spread on the same certified stone. Brilliant Earth lists it at $4,179. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle33.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728533556
Dimensions6.54 × 6.41 × 4.14 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
6.54 mm6.41 mm1.51 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728533556
Side View
Table 59.0%Crown 34°Girdle: MED-THKPavilion 33.6°Culet: NoneDepth 64.6%

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 3
Current: $4,179 CAD|Low: $723 CAD|High: $6,135 CAD|Avg: $2,214 CAD|-31.9%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 3, 2026
Retailer 14$723 CAD
Retailer 8$878 CAD
Retailer 7$1,013 CAD
Retailer 17$1,073 CAD
Retailer 3$1,215 CAD
Retailer 9$1,293 CAD
Retailer 2$1,326 CAD
Retailer 12$1,380 CAD
Retailer 13$1,490 CAD
Retailer 11$1,871 CAD
Retailer 6$2,046 CAD
Retailer 4$2,474 CAD
Retailer 15$2,616 CAD
Retailer 18$2,836 CAD
Retailer 10$2,897 CAD
Retailer 16$2,941 CAD
Retailer 5$3,387 CAD
Brilliant Earth$4,179 CAD

38 data points across 18 retailers

19 retailers$723 CAD to $4,179 CAD

A
Cheapest Retailer
-
$723 CAD
$517 USD
Final sale: no returns
Retailer 2
-
$878 CAD
$628 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$1,013 CAD
$725 USD
View
A
Retailer 4
-
$1,073 CAD
$768 USD
View
A
Retailer 5
-
$1,215 CAD
€828 EUR
View
A
Retailer 6
-
$1,293 CAD
$925 USD
View
A
Retailer 7
-
$1,326 CAD
£747 GBP
View
A
Retailer 8
-
$1,380 CAD
ZAR 15,957 ZAR
View
A
Retailer 9
-
$1,490 CAD
$1,066 USD
View
A
Retailer 10
-
$1,871 CAD
$1,339 USD
View
B+
Retailer 11
-
$2,046 CAD
A$2,252 AUD
View
B+
Retailer 12
-
$2,474 CAD
$1,770 USD
View
B+
Retailer 13
-
$2,616 CAD
$1,872 USD
View
B+
Retailer 14
-
$2,836 CAD
$2,029 USD
View
Retailer 15
-
$2,897 CAD
£1,632 GBP
View
Price last confirmed 23 days ago
B+
Retailer 16
-
$2,941 CAD
£1,657 GBP
View
B+
Retailer 17
-
$3,387 CAD
A$3,729 AUD
View
B
Retailer 18
-
$3,976 CAD
£2,240 GBP
View
Most Expensive
B
Brilliant Earth
15509665A · Nov 3
$4,179 CAD
$2,990 USD
View
18 more retailers have this diamond
Prices start from $723 CADSave up to $3,456 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
1.51ct Cushion
$723 CAD