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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 $5,722 CAD
$4,088 USD
As of October 29, 2026
Save $16,545 CAD (74%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $22,267 CAD 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 $5,722 to $22,267, a $16,545 spread on the same certified stone. MOH London lists it at $22,267. 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 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $22,267 CAD|Low: $5,722 CAD|High: $49,085 CAD|Avg: $21,015 CAD|-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 30, 2026
Retailer 8$5,722 CAD
Retailer 15$8,671 CAD
Retailer 14$9,162 CAD
Retailer 3$9,752 CAD
Retailer 11$11,852 CAD
Retailer 12$12,151 CAD
Retailer 10$12,484 CAD
Retailer 9$12,674 CAD
Retailer 13$13,391 CAD
Retailer 6$16,879 CAD
Retailer 2$18,217 CAD
MOH London$22,267 CAD
Retailer 4$31,827 CAD
Retailer 7$41,545 CAD
Retailer 5$49,085 CAD

30 data points across 15 retailers

10 retailers$5,722 CAD to $22,267 CAD

A
Cheapest Retailer
-
$5,722 CAD
$4,088 USD
A
Retailer 2
-
$8,671 CAD
$6,195 USD
View
Final sale: no returns
A
Retailer 3
-
$9,162 CAD
$6,546 USD
View
A
Retailer 4
-
$11,852 CAD
$8,468 USD
View
A
Retailer 5
-
$12,151 CAD
$8,682 USD
View
B+
Retailer 6
-
$12,484 CAD
$8,920 USD
View
B+
Retailer 7
-
$12,674 CAD
€8,624 EUR
View
B+
Retailer 8
-
$13,391 CAD
$9,568 USD
View
B+
Retailer 9
-
$18,217 CAD
$13,016 USD
View
Most Expensive
B
MOH London
LG780662186 · Oct 29
$22,267 CAD
£12,527 GBP
View
9 more retailers have this diamond
Prices start from $5,722 CADSave up to $16,545 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
$5,722 CAD