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Cushion|Lab Grown|IGI

4.21ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG804605050

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG804605050

Diamond specifications and retailer prices

From HK$44,736 HKD
$5,702 USD
As of October 26, 2026
Save HK$226,560 HKD (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: HK$271,296 HKD at With Clarity · As of October 31, 2026
View at With Clarity

About this 4.21ct lab-grown cushion diamond

This 4.21ct 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 LG804605050 or 804605050. Listed at 21 retailers as of October 26, 2026, with prices from HK$44,736 to HK$271,296, a HK$226,560 spread on the same certified stone. With Clarity lists it at HK$271,296. 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

4.21
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804605050
Dimensions10.97 × 8.56 × 5.72 mm
L/W Ratio1.28
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
10.97 mm8.56 mm4.21 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804605050
Side View
Table 61.0%Crown 35.5°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 66.8%

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 26
Current: HK$108,708 HKD|Low: HK$43,191 HKD|High: HK$266,150 HKD|Avg: HK$104,163 HKD
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
With Clarity
November 1, 2026
Retailer 15HK$44,736 HKD
Retailer 5HK$49,721 HKD
Retailer 3HK$52,566 HKD
Retailer 4HK$53,390 HKD
Retailer 2HK$53,421 HKD
Retailer 6HK$53,978 HKD
Retailer 13HK$61,204 HKD
Retailer 11HK$68,707 HKD
Retailer 12HK$83,797 HKD
Retailer 17HK$90,398 HKD
Retailer 1HK$108,708 HKD
Retailer 14HK$113,702 HKD
Retailer 16HK$119,459 HKD
Retailer 7HK$137,776 HKD
Retailer 8HK$144,016 HKD
Retailer 9HK$148,616 HKD
Retailer 18HK$173,468 HKD
Retailer 10HK$187,070 HKD
With ClarityHK$266,150 HKD

40 data points across 19 retailers

21 retailersHK$44,736 HKD to HK$271,296 HKD

A
Cheapest Retailer
-
HK$44,736 HKD
$5,702 USD
A
Retailer 2
-
HK$49,721 HKD
CA$8,802 CAD
View
A
Retailer 3
-
HK$52,566 HKD
$6,700 USD
View
A
Retailer 4
-
HK$53,390 HKD
$6,805 USD
View
Retailer 5
-
HK$53,421 HKD
$6,809 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
HK$53,978 HKD
$6,880 USD
View
A
Retailer 7
-
HK$61,204 HKD
$7,801 USD
View
Final sale: no returns
A
Retailer 8
-
HK$68,707 HKD
£6,895 GBP
View
B+
Retailer 9
-
HK$76,046 HKD
£7,632 GBP
View
B+
Retailer 10
-
HK$83,797 HKD
€10,172 EUR
View
B+
Retailer 11
-
HK$90,398 HKD
$11,522 USD
View
B+
Retailer 12
-
HK$108,708 HKD
£10,910 GBP
View
B+
Retailer 13
-
HK$113,702 HKD
ZAR 234,123 ZAR
View
B
Retailer 14
-
HK$119,459 HKD
$15,226 USD
View
B
Retailer 15
-
HK$137,776 HKD
$17,561 USD
View
B
Retailer 16
-
HK$144,016 HKD
$18,356 USD
View
B
Retailer 17
-
HK$148,616 HKD
$18,942 USD
View
B
Retailer 18
-
HK$157,094 HKD
$20,023 USD
View
B
Retailer 19
-
HK$173,468 HKD
$22,110 USD
View
B
Retailer 20
-
HK$187,070 HKD
$23,844 USD
View
Most Expensive
B
With Clarity
804605050 · Oct 31
HK$271,296 HKD
$34,579 USD
View
20 more retailers have this diamond
Prices start from HK$44,736 HKDSave up to HK$226,560 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
4.21ct Cushion
HK$44,736 HKD