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Cushion|Lab Grown|IGI

1.09ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG818663196

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

Certificate IGI LG818663196

Diamond specifications and retailer prices

From HK$2,966 HKD
$378 USD
As of October 30, 2026
Save HK$12,412 HKD (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$15,378 HKD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.09ct lab-grown cushion diamond

This 1.09ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818663196 or 818663196. Listed at 15 retailers as of October 30, 2026, with prices from HK$2,966 to HK$15,378, a HK$12,412 spread on the same certified stone. Brilliant Earth lists it at HK$15,378. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818663196
Dimensions5.98 × 5.97 × 4.01 mm
L/W Ratio1.00
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
5.98 mm5.97 mm1.09 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818663196
Side View
Table 60.0%Crown 35.2°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 67.2%

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$15,378 HKD|Low: HK$2,966 HKD|High: HK$17,810 HKD|Avg: HK$8,032 HKD|-13.7%
Brilliant Earth
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
October 31, 2026
Retailer 15HK$2,966 HKD
Retailer 10HK$3,491 HKD
Retailer 6HK$3,687 HKD
Retailer 9HK$4,982 HKD
Retailer 3HK$5,312 HKD
Retailer 2HK$5,314 HKD
Retailer 14HK$5,390 HKD
Retailer 12HK$5,656 HKD
Retailer 5HK$5,759 HKD
Retailer 8HK$5,903 HKD
Retailer 4HK$10,919 HKD
Retailer 7HK$10,945 HKD
Retailer 13HK$12,828 HKD
Retailer 11HK$13,262 HKD
Brilliant EarthHK$15,378 HKD

36 data points across 15 retailers

15 retailersHK$2,966 HKD to HK$15,378 HKD

A
Cheapest Retailer
-
HK$2,966 HKD
$378 USD
Final sale: no returns
A
Retailer 2
-
HK$3,491 HKD
£350 GBP
View
A
Retailer 3
-
HK$3,687 HKD
$470 USD
View
A
Retailer 4
-
HK$4,982 HKD
$635 USD
View
A
Retailer 5
-
HK$5,312 HKD
$677 USD
View
A
Retailer 6
-
HK$5,314 HKD
€645 EUR
View
A
Retailer 7
-
HK$5,390 HKD
$687 USD
View
A
Retailer 8
-
HK$5,656 HKD
ZAR 11,646 ZAR
View
A
Retailer 9
-
HK$5,759 HKD
$734 USD
View
A
Retailer 10
-
HK$5,903 HKD
£592 GBP
View
B+
Retailer 11
-
HK$10,919 HKD
$1,392 USD
View
Retailer 12
-
HK$10,945 HKD
$1,395 USD
View
Price last confirmed 13 days ago
B
Retailer 13
-
HK$12,828 HKD
$1,635 USD
View
B+
Retailer 14
-
HK$13,262 HKD
£1,331 GBP
View
Most Expensive
B
Brilliant Earth
21242470A · Oct 31
HK$15,378 HKD
$1,960 USD
View
14 more retailers have this diamond
Prices start from HK$2,966 HKDSave up to HK$12,412 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
1.09ct Cushion
HK$2,966 HKD