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Cushion|Lab Grown|IGI

4.50ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG778683718

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG778683718

Diamond specifications and retailer prices

From $1,383 CAD
$990 USD
As of November 2, 2026
Save $6,402 CAD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,785 CAD at Mervis Diamond Importers · As of October 31, 2026
View at Mervis Diamond Importers

About this 4.5ct lab-grown cushion diamond

This 4.5ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778683718 or 778683718. Listed at 11 retailers as of October 31, 2026, with prices from $1,383 to $7,785, a $6,402 spread on the same certified stone. Mervis Diamond Importers lists it at $7,785. 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

4.50
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778683718
Dimensions12.18 × 8.64 × 5.48 mm
L/W Ratio1.41
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.18 mm8.64 mm4.50 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778683718
Side View
Table 60.0%Crown 33.4°Girdle: MED-STKPavilion 34.5°Culet: NoneDepth 63.4%

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: Nov 2
Current: $7,785 CAD|Low: $1,138 CAD|High: $8,458 CAD|Avg: $3,116 CAD|-8.0%
Mervis Diamond Importers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10$1,138 CAD
Retailer 5$1,383 CAD
Retailer 9$1,606 CAD
Retailer 6$1,743 CAD
Retailer 11$1,746 CAD
Retailer 2$1,925 CAD
Retailer 3$3,042 CAD
Retailer 8$4,016 CAD
Retailer 7$4,448 CAD
Retailer 4$4,708 CAD
Mervis Diamond Importers$7,785 CAD

41 data points across 11 retailers

11 retailers$1,383 CAD to $7,785 CAD

Retailer 1
-
$1,138 CAD
$815 USD
Price last confirmed 20 days ago
A
Retailer 2
-
$1,383 CAD
$990 USD
View
Retailer 3
-
$1,606 CAD
$1,150 USD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$1,743 CAD
$1,248 USD
View
A
Retailer 5
-
$1,746 CAD
$1,250 USD
View
A
Retailer 6
-
$1,925 CAD
£1,085 GBP
View
B+
Retailer 7
-
$3,042 CAD
$2,178 USD
View
Retailer 8
-
$4,016 CAD
$2,875 USD
View
Price last confirmed 14 days ago
B
Retailer 9
-
$4,448 CAD
$3,184 USD
View
B
Retailer 10
-
$4,708 CAD
£2,654 GBP
View
Most Expensive
B
Mervis Diamond Importers
1985410031 · Oct 31
$7,785 CAD
$5,573 USD
View
10 more retailers have this diamond
Prices start from $1,383 CADSave up to $6,402 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
4.50ct Cushion
$1,383 CAD