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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

VG • E/IF • IGI LG638415688

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

Certificate IGI LG638415688

Diamond specifications and retailer prices

From $967 CAD
$692 USD
As of October 29, 2026
Save $3,559 CAD (79%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,526 CAD at Brilliant Earth · As of October 30, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG638415688 or 638415688. Listed at 18 retailers as of October 29, 2026, with prices from $967 to $4,526, a $3,559 spread on the same certified stone. Brilliant Earth lists it at $4,526. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
E
Color
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG638415688
Dimensions6.67 × 6.60 × 4.47 mm
L/W Ratio1.01
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
6.67 mm6.60 mm1.51 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG638415688
Side View
Table 60.0%Crown 36.5°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 67.7%

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: Oct 29
Current: $4,526 CAD|Low: $919 CAD|High: $4,582 CAD|Avg: $2,273 CAD|-1.2%
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
October 30, 2026
Retailer 8$967 CAD
Retailer 3$1,018 CAD
Retailer 13$1,173 CAD
Retailer 4$1,313 CAD
Retailer 6$1,362 CAD
Retailer 2$1,591 CAD
Retailer 7$1,710 CAD
Retailer 10$1,749 CAD
Retailer 11$2,384 CAD
Retailer 14$3,079 CAD
Retailer 5$3,291 CAD
Retailer 12$3,408 CAD
Retailer 9$4,442 CAD
Brilliant Earth$4,526 CAD

41 data points across 14 retailers

18 retailers$967 CAD to $4,526 CAD

A
Cheapest Retailer
-
$967 CAD
$692 USD
Final sale: no returns
Retailer 2
-
$1,018 CAD
$729 USD
View
Price last confirmed 14 days ago
A
Retailer 3
-
$1,173 CAD
$840 USD
View
A
Retailer 4
-
$1,313 CAD
$940 USD
View
A
Retailer 5
-
$1,362 CAD
$975 USD
View
A
Retailer 6
-
$1,558 CAD
$1,115 USD
View
A
Retailer 7
-
$1,591 CAD
£897 GBP
View
A
Retailer 8
-
$1,710 CAD
€1,166 EUR
View
A
Retailer 9
-
$1,749 CAD
ZAR 20,230 ZAR
View
Retailer 10
-
$2,384 CAD
A$2,626 AUD
View
Price last confirmed 10 days ago
B+
Retailer 11
-
$2,959 CAD
£1,668 GBP
View
B
Retailer 12
-
$3,079 CAD
$2,204 USD
View
B
Retailer 13
-
$3,248 CAD
$2,325 USD
View
B
Retailer 14
-
$3,294 CAD
$2,358 USD
View
B
Retailer 15
-
$3,358 CAD
$2,404 USD
View
Retailer 16
-
$3,408 CAD
$2,440 USD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$4,442 CAD
£2,504 GBP
View
Most Expensive
B
Brilliant Earth
12444282A · Oct 30
$4,526 CAD
$3,240 USD
View
17 more retailers have this diamond
Prices start from $967 CADSave up to $3,559 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
$967 CAD