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Cushion|Lab Grown|IGI

4.28ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG780663283

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG780663283

Diamond specifications and retailer prices

From HK$34,529 HKD
$4,401 USD
As of November 1, 2026
Save HK$120,086 HKD (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$154,615 HKD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 4.28ct lab-grown cushion diamond

This 4.28ct 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 LG780663283 or 780663283. Listed at 14 retailers as of October 31, 2026, with prices from HK$34,529 to HK$154,615, a HK$120,086 spread on the same certified stone. Blue Nile lists it at HK$154,615. 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

4.28
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780663283
Dimensions11.04 × 8.60 × 5.74 mm
L/W Ratio1.28
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
11.04 mm8.60 mm4.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780663283
Side View
Table 60.0%Crown 34°Girdle: MED-THKPavilion 35.2°Culet: NoneDepth 66.7%

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$154,615 HKD|Low: HK$34,529 HKD|High: HK$176,371 HKD|Avg: HK$88,649 HKD|+48.2%
Blue Nile
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
November 1, 2026
Retailer 9HK$34,529 HKD
Retailer 8HK$36,883 HKD
Retailer 14HK$50,614 HKD
Retailer 2HK$51,914 HKD
Retailer 5HK$64,060 HKD
Retailer 7HK$65,327 HKD
Retailer 6HK$67,551 HKD
Retailer 10HK$68,477 HKD
Retailer 13HK$85,205 HKD
Retailer 3HK$88,879 HKD
Retailer 11HK$104,034 HKD
Retailer 4HK$115,245 HKD
Retailer 12HK$142,812 HKD
Blue NileHK$154,615 HKD

36 data points across 14 retailers

14 retailersHK$34,529 HKD to HK$154,615 HKD

A
Cheapest Retailer
-
HK$34,529 HKD
$4,401 USD
A
Retailer 2
-
HK$36,883 HKD
$4,701 USD
View
A
Retailer 3
-
HK$50,614 HKD
View
A
Retailer 4
-
HK$51,914 HKD
£5,210 GBP
View
Retailer 5
-
HK$64,060 HKD
$8,165 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
HK$65,327 HKD
€7,930 EUR
View
A
Retailer 7
-
HK$67,551 HKD
$8,610 USD
View
A
Retailer 8
-
HK$68,477 HKD
$8,728 USD
View
B+
Retailer 9
-
HK$85,205 HKD
ZAR 175,446 ZAR
View
B+
Retailer 10
-
HK$88,879 HKD
£8,920 GBP
View
B+
Retailer 11
-
HK$104,034 HKD
$13,260 USD
View
B+
Retailer 12
-
HK$115,245 HKD
$14,689 USD
View
B
Retailer 13
-
HK$142,812 HKD
$18,203 USD
View
Most Expensive
B
Blue Nile
29314697 · Oct 31
HK$154,615 HKD
$19,707 USD
View
13 more retailers have this diamond
Prices start from HK$34,529 HKDSave up to HK$120,086 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
4.28ct Cushion
HK$34,529 HKD