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Cushion|Lab Grown|IGI

1.28ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG840622511

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

Certificate IGI LG840622511

Diamond specifications and retailer prices

From HK$3,311 HKD
$422 USD
As of October 30, 2026
Save HK$14,930 HKD (82%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: HK$18,241 HKD at Helzberg Diamonds · As of October 29, 2026
View at Helzberg Diamonds

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG840622511 or 840622511. Listed at 17 retailers as of October 29, 2026, with prices from HK$3,311 to HK$18,241, a HK$14,930 spread on the same certified stone. Helzberg Diamonds lists it at HK$18,241. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840622511
Dimensions6.20 × 6.14 × 4.10 mm
L/W Ratio1.01
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
6.20 mm6.14 mm1.28 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840622511
Side View
Table 62.0%Crown 35.1°Girdle: MED-STKPavilion 36.2°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 30
Current: HK$18,241 HKD|Low: HK$3,311 HKD|High: HK$21,262 HKD|Avg: HK$9,586 HKD
Helzberg Diamonds
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
October 30, 2026
Retailer 6HK$3,311 HKD
Retailer 15HK$3,664 HKD
Retailer 10HK$3,886 HKD
Retailer 4HK$5,516 HKD
Retailer 14HK$5,531 HKD
Retailer 7HK$5,837 HKD
Retailer 12HK$6,187 HKD
Retailer 13HK$6,295 HKD
Retailer 11HK$6,624 HKD
Retailer 17HK$7,155 HKD
Retailer 5HK$12,080 HKD
Retailer 8HK$12,227 HKD
Retailer 9HK$12,710 HKD
Retailer 3HK$14,083 HKD
Retailer 16HK$14,338 HKD
Retailer 2HK$14,907 HKD
Helzberg DiamondsHK$18,241 HKD

17 data points across 17 retailers

17 retailersHK$3,311 HKD to HK$18,241 HKD

A
Cheapest Retailer
-
HK$3,311 HKD
$422 USD
Final sale: no returns
A
Retailer 2
-
HK$3,664 HKD
$467 USD
View
A
Retailer 3
-
HK$3,886 HKD
£390 GBP
View
A
Retailer 4
-
HK$5,516 HKD
$703 USD
View
B+
Retailer 5
-
HK$5,531 HKD
$705 USD
View
A
Retailer 6
-
HK$5,837 HKD
$744 USD
View
A
Retailer 7
-
HK$6,187 HKD
€751 EUR
View
A
Retailer 8
-
HK$6,295 HKD
ZAR 12,963 ZAR
View
B+
Retailer 9
-
HK$6,624 HKD
£665 GBP
View
B+
Retailer 10
-
HK$7,155 HKD
$912 USD
View
B
Retailer 11
-
HK$12,080 HKD
$1,540 USD
View
B
Retailer 12
-
HK$12,227 HKD
SGD 2,106 SGD
View
Retailer 13
-
HK$12,710 HKD
$1,620 USD
View
Price last confirmed 15 days ago
B
Retailer 14
-
HK$14,083 HKD
$1,795 USD
View
B
Retailer 15
-
HK$14,338 HKD
£1,439 GBP
View
B
Retailer 16
-
HK$14,907 HKD
$1,900 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMIILHH · Oct 29
HK$18,241 HKD
$2,325 USD
View
16 more retailers have this diamond
Prices start from HK$3,311 HKDSave up to HK$14,930 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
1.28ct Cushion
HK$3,311 HKD