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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 $5,606 SGD
£3,453 GBP
As of October 30, 2026
Save $29,284 SGD (84%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $34,890 SGD 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 $5,606 to $34,890, a $29,284 spread on the same certified stone. With Clarity lists it at $34,890. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $6,756 SGD|Low: $5,184 SGD|High: $37,681 SGD|Avg: $13,483 SGD|+7.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
With Clarity
October 31, 2026
Retailer 5$5,606 SGD
Retailer 1$6,756 SGD
Retailer 2$8,283 SGD
Retailer 7$9,628 SGD
Retailer 6$12,293 SGD
Retailer 3$12,328 SGD
Retailer 8$12,893 SGD
Retailer 4$20,199 SGD
With Clarity$34,890 SGD

7 data points across 9 retailers

9 retailers$5,606 SGD to $34,890 SGD

A
Cheapest Retailer
-
$5,606 SGD
£3,453 GBP
A
Retailer 2
-
$6,756 SGD
$5,285 USD
View
A
Retailer 3
-
$8,283 SGD
$6,479 USD
View
A
Retailer 4
-
$9,628 SGD
$7,531 USD
View
B+
Retailer 5
-
$12,293 SGD
€9,158 EUR
View
B+
Retailer 6
-
$12,328 SGD
$9,643 USD
View
B+
Retailer 7
-
$12,893 SGD
£7,941 GBP
View
B+
Retailer 8
-
$20,199 SGD
$15,800 USD
View
Most Expensive
B
With Clarity
846663139 · Oct 31
$34,890 SGD
$27,292 USD
View
8 more retailers have this diamond
Prices start from $5,606 SGDSave up to $29,284 SGD

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
$5,606 SGD