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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 HK$31,303 HKD
£3,142 GBP
As of November 1, 2026
Save HK$182,822 HKD (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$214,125 HKD 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 31, 2026, with prices from HK$31,303 to HK$214,125, a HK$182,822 spread on the same certified stone. With Clarity lists it at HK$214,125. 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: Nov 1
Current: HK$77,819 HKD|Low: HK$31,303 HKD|High: HK$231,252 HKD|Avg: HK$82,163 HKD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
With Clarity
November 1, 2026
Retailer 3HK$31,303 HKD
Retailer 4HK$37,973 HKD
Retailer 6HK$49,514 HKD
Retailer 2HK$58,192 HKD
Retailer 7HK$74,916 HKD
Retailer 8HK$75,656 HKD
Retailer 1HK$77,819 HKD
Retailer 5HK$106,466 HKD
With ClarityHK$214,125 HKD

8 data points across 9 retailers

9 retailersHK$31,303 HKD to HK$214,125 HKD

A
Cheapest Retailer
-
HK$31,303 HKD
£3,142 GBP
A
Retailer 2
-
HK$37,973 HKD
$4,840 USD
View
A
Retailer 3
-
HK$49,514 HKD
$6,311 USD
View
A
Retailer 4
-
HK$58,192 HKD
$7,417 USD
View
B+
Retailer 5
-
HK$74,916 HKD
€9,094 EUR
View
B+
Retailer 6
-
HK$75,656 HKD
$9,643 USD
View
B+
Retailer 7
-
HK$77,819 HKD
£7,810 GBP
View
B+
Retailer 8
-
HK$106,466 HKD
$13,570 USD
View
Most Expensive
B
With Clarity
846663139 · Oct 31
HK$214,125 HKD
$27,292 USD
View
8 more retailers have this diamond
Prices start from HK$31,303 HKDSave up to HK$182,822 HKD

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
HK$31,303 HKD