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Cushion|Lab Grown|IGI

4.21ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG628448091

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG628448091

Diamond specifications and retailer prices

From HK$31,006 HKD
$3,952 USD
As of November 1, 2026
Save HK$161,998 HKD (84%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$193,004 HKD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 LG628448091 or 628448091. Listed at 12 retailers as of October 31, 2026, with prices from HK$31,006 to HK$193,004, a HK$161,998 spread on the same certified stone. Do Amore Diamonds lists it at HK$193,004. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628448091
Dimensions9.23 × 9.07 × 6.15 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
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
9.23 mm9.07 mm4.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628448091
Side View
Table 58.0%Crown 37.5°Girdle: THK-VTKPavilion 37.6°Culet: NoneDepth 67.8%

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: Nov 1
Current: HK$193,004 HKD|Low: HK$31,006 HKD|High: HK$255,534 HKD|Avg: HK$91,717 HKD|-24.5%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7HK$31,006 HKD
Retailer 10HK$32,481 HKD
Retailer 9HK$36,216 HKD
Retailer 3HK$44,140 HKD
Retailer 5HK$50,471 HKD
Retailer 6HK$61,431 HKD
Retailer 12HK$64,021 HKD
Retailer 2HK$76,952 HKD
Retailer 11HK$89,246 HKD
Retailer 8HK$102,386 HKD
Retailer 4HK$157,094 HKD
Do Amore DiamondsHK$193,004 HKD

31 data points across 12 retailers

12 retailersHK$31,006 HKD to HK$193,004 HKD

A
Cheapest Retailer
-
HK$31,006 HKD
$3,952 USD
A
Retailer 2
-
HK$32,481 HKD
$4,140 USD
View
A
Retailer 3
-
HK$36,216 HKD
$4,616 USD
View
A
Retailer 4
-
HK$44,140 HKD
$5,626 USD
View
Final sale: no returns
A
Retailer 5
-
HK$50,471 HKD
$6,433 USD
View
A
Retailer 6
-
HK$61,431 HKD
€7,457 EUR
View
Retailer 7
-
HK$64,021 HKD
$8,160 USD
View
Price last confirmed 13 days ago
B+
Retailer 8
-
HK$76,952 HKD
£7,723 GBP
View
B+
Retailer 9
-
HK$89,246 HKD
$11,375 USD
View
B+
Retailer 10
-
HK$102,386 HKD
$13,050 USD
View
B
Retailer 11
-
HK$157,094 HKD
$20,023 USD
View
Most Expensive
B
Do Amore Diamonds
27-AD300EFA9 · Oct 31
HK$193,004 HKD
$24,600 USD
View
11 more retailers have this diamond
Prices start from HK$31,006 HKDSave up to HK$161,998 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$31,006 HKD