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Cushion|Lab Grown|IGI

4.50ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG780661294

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG780661294

Diamond specifications and retailer prices

From $20,640 CAD
$14,770 USD
As of November 2, 2026
2 retailers carry this diamond
Most expensive: $20,640 CAD at Brilliant Earth
View at Brilliant Earth

About this 4.5ct lab-grown cushion diamond

This 4.5ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780661294 or 780661294. Listed at 2 retailers as of November 2, 2026. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.50
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780661294
Dimensions11.32 × 8.79 × 5.77 mm
L/W Ratio1.29
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
11.32 mm8.79 mm4.50 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780661294
Side View
Table 58.0%Crown 34.8°Girdle: STK-THKPavilion 34.8°Culet: NoneDepth 65.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: $20,640 CAD|Low: $7,635 CAD|High: $52,081 CAD|Avg: $23,440 CAD|-40.9%
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
October 30, 2026
Retailer 2$7,635 CAD
Retailer 11$8,454 CAD
Retailer 8$8,479 CAD
Retailer 15$9,592 CAD
Retailer 7$10,154 CAD
Retailer 9$11,515 CAD
Retailer 12$15,151 CAD
Retailer 5$18,840 CAD
Retailer 14$19,962 CAD
Brilliant Earth$20,640 CAD
Retailer 13$23,272 CAD
Retailer 4$33,680 CAD
Retailer 6$44,730 CAD
Retailer 10$49,999 CAD
Retailer 3$50,567 CAD

12 data points across 15 retailers

2 retailers

Retailer 1
-
$19,962 CAD
£11,248 GBP
Price last confirmed 33 days ago
Most Expensive
B+
Brilliant Earth
18350458B · Nov 2
$20,640 CAD
$14,770 USD
View
1 more retailer has this diamond

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.

B+
4.50ct Cushion
$20,640 CAD