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Cushion|Lab Grown|IGI

4.20ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG780662186

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG780662186

Diamond specifications and retailer prices

From €3,659 EUR
$4,088 USD
As of October 29, 2026
Save €10,581 EUR (74%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €14,240 EUR at MOH London · As of October 29, 2026
View at MOH London

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 LG780662186 or 780662186. Listed at 10 retailers as of October 29, 2026, with prices from €3,659 to €14,240, a €10,581 spread on the same certified stone. MOH London lists it at €14,240. 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 angle36.6°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780662186
Dimensions10.92 × 8.47 × 5.81 mm
L/W Ratio1.29
Girdle conditionFaceted
Culet sizeLarge
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
10.92 mm8.47 mm4.20 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780662186
Side View
Table 53.0%Crown 36.6°Girdle: THK-VTKPavilion 41.9°Culet: LargeDepth 68.6%

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 29
Current: €14,240 EUR|Low: €3,659 EUR|High: €31,391 EUR|Avg: €12,787 EUR|-4.0%
MOH London
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 31, 2026
Retailer 13€3,659 EUR
Retailer 11€3,835 EUR
Retailer 15€5,545 EUR
Retailer 10€5,629 EUR
Retailer 8€5,854 EUR
Retailer 3€6,237 EUR
Retailer 14€7,580 EUR
Retailer 9€7,581 EUR
Retailer 2€8,048 EUR
Retailer 6€10,795 EUR
Retailer 12€11,650 EUR
MOH London€14,240 EUR
Retailer 4€20,354 EUR
Retailer 7€26,570 EUR
Retailer 5€31,391 EUR

32 data points across 15 retailers

10 retailers€3,659 EUR to €14,240 EUR

A
Cheapest Retailer
-
€3,659 EUR
$4,088 USD
A
Retailer 2
-
€3,835 EUR
$4,284 USD
View
A
Retailer 3
-
€5,545 EUR
$6,195 USD
View
Final sale: no returns
A
Retailer 4
-
€5,629 EUR
$6,289 USD
View
A
Retailer 5
-
€5,854 EUR
$6,540 USD
View
A
Retailer 6
-
€7,580 EUR
$8,468 USD
View
A
Retailer 7
-
€7,581 EUR
$8,470 USD
View
B+
Retailer 8
-
€8,048 EUR
View
B+
Retailer 9
-
€11,650 EUR
$13,016 USD
View
Most Expensive
B
MOH London
LG780662186 · Oct 29
€14,240 EUR
£12,527 GBP
View
9 more retailers have this diamond
Prices start from €3,659 EURSave up to €10,581 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
€3,659 EUR