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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 €3,925 EUR
£3,453 GBP
As of October 30, 2026
Save €20,504 EUR (84%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €24,429 EUR at With Clarity · As of October 31, 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 30, 2026, with prices from €3,925 to €24,429, a €20,504 spread on the same certified stone. With Clarity lists it at €24,429. 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
Colour
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: €12,146 EUR|Low: €3,630 EUR|High: €26,383 EUR|Avg: €9,401 EUR|-14.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
With Clarity
October 31, 2026
Retailer 6€3,925 EUR
Retailer 4€4,731 EUR
Retailer 2€5,649 EUR
Retailer 7€6,741 EUR
Retailer 3€8,547 EUR
Retailer 5€8,631 EUR
Retailer 8€9,027 EUR
Retailer 1€12,146 EUR
With Clarity€24,429 EUR

7 data points across 9 retailers

9 retailers€3,925 EUR to €24,429 EUR

A
Cheapest Retailer
-
€3,925 EUR
£3,453 GBP
A
Retailer 2
-
€4,731 EUR
$5,285 USD
View
A
Retailer 3
-
€5,649 EUR
$6,311 USD
View
A
Retailer 4
-
€6,741 EUR
$7,531 USD
View
B+
Retailer 5
-
€8,547 EUR
View
B+
Retailer 6
-
€8,631 EUR
$9,643 USD
View
B+
Retailer 7
-
€9,027 EUR
£7,941 GBP
View
B+
Retailer 8
-
€12,146 EUR
$13,570 USD
View
Most Expensive
B
With Clarity
846663139 · Oct 31
€24,429 EUR
$27,292 USD
View
8 more retailers have this diamond
Prices start from €3,925 EURSave up to €20,504 EUR

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
€3,925 EUR