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Cushion|Lab Grown|IGI

1.51ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG459119539

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

Certificate IGI LG459119539

Diamond specifications and retailer prices

From $341 CAD
$244 USD
As of October 30, 2026
Save $2,495 CAD (88%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,836 CAD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459119539 or 459119539. Listed at 13 retailers as of October 30, 2026, with prices from $341 to $2,836, a $2,495 spread on the same certified stone. Do Amore Diamonds lists it at $2,836. 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

1.51
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.5°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459119539
Dimensions6.63 × 6.39 × 4.55 mm
L/W Ratio1.04
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
6.63 mm6.39 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG459119539
Side View
Table 63.5%Crown 35.5°Girdle: MED-THKPavilion 39.7°Culet: NoneDepth 71.2%

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 30
Current: $755 CAD|Low: $235 CAD|High: $1,636 CAD|Avg: $809 CAD|+3.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 7$341 CAD
Retailer 9$522 CAD
Retailer 4$570 CAD
Retailer 2$676 CAD
Retailer 6$722 CAD
Retailer 1$755 CAD
Retailer 8$882 CAD
Retailer 5$1,397 CAD
Retailer 3$1,625 CAD

43 data points across 9 retailers

13 retailers$341 CAD to $2,836 CAD

A
Cheapest Retailer
-
$341 CAD
$244 USD
Final sale: no returns
A
Retailer 2
-
$522 CAD
$374 USD
View
B+
Retailer 3
-
$570 CAD
$408 USD
View
A
Retailer 4
-
$572 CAD
HK$3,200 HKD
View
A
Retailer 5
-
$676 CAD
€461 EUR
View
A
Retailer 6
-
$722 CAD
$517 USD
View
A
Retailer 7
-
$755 CAD
£426 GBP
View
B+
Retailer 8
-
$882 CAD
$631 USD
View
B
Retailer 9
-
$1,397 CAD
$1,000 USD
View
B
Retailer 10
-
$1,536 CAD
$1,100 USD
View
B
Retailer 11
-
$1,625 CAD
£916 GBP
View
B
Retailer 12
-
$1,649 CAD
SGD 1,595 SGD
View
Most Expensive
B
Do Amore Diamonds
27-7E8361953 · Oct 31
$2,836 CAD
$2,030 USD
View
12 more retailers have this diamond
Prices start from $341 CADSave up to $2,495 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
$341 CAD