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Cushion|Lab Grown|IGI

4.20ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846663139

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846663139

Diamond specifications and retailer prices

From $6,138 CAD
£3,453 GBP
As of October 30, 2026
Save $35,116 CAD (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $41,253 CAD at With Clarity · As of October 28, 2026
View at With Clarity

About this 4.2ct lab-grown cushion diamond

This 4.2ct 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 LG846663139 or 846663139. Listed at 9 retailers as of October 28, 2026, with prices from $6,138 to $41,253, a $35,116 spread on the same certified stone. With Clarity lists it at $41,253. 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

4.20
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663139
Dimensions11.69 × 8.30 × 5.51 mm
L/W Ratio1.41
Girdle conditionFaceted
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
11.69 mm8.30 mm4.20 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663139
Side View
Table 61.0%Crown 31.7°Girdle: STK-THKPavilion 35.4°Culet: NoneDepth 66.4%

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: Oct 30
Current: $6,138 CAD|Low: $5,676 CAD|High: $41,253 CAD|Avg: $14,589 CAD|+8.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
With Clarity
October 30, 2026
Retailer 1$6,138 CAD
Retailer 3$7,026 CAD
Retailer 4$8,928 CAD
Retailer 6$10,540 CAD
Retailer 2$13,458 CAD
Retailer 7$14,115 CAD
Retailer 5$14,577 CAD
With Clarity$41,253 CAD

6 data points across 8 retailers

9 retailers$6,138 CAD to $41,253 CAD

A
Cheapest Retailer
-
$6,138 CAD
£3,453 GBP
A
Retailer 2
-
$7,026 CAD
$5,020 USD
View
A
Retailer 3
-
$8,928 CAD
$6,379 USD
View
A
Retailer 4
-
$10,540 CAD
$7,531 USD
View
B+
Retailer 5
-
$13,458 CAD
€9,158 EUR
View
B+
Retailer 6
-
$14,115 CAD
£7,941 GBP
View
B+
Retailer 7
-
$14,577 CAD
$10,415 USD
View
B
Retailer 8
-
$30,875 CAD
$22,060 USD
View
Most Expensive
B
With Clarity
846663139 · Oct 28
$41,253 CAD
$29,475 USD
View
8 more retailers have this diamond
Prices start from $6,138 CADSave up to $35,116 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
4.20ct Cushion
$6,138 CAD