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Cushion|Lab Grown|IGI

1.05ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG818657598

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

Certificate IGI LG818657598

Diamond specifications and retailer prices

From HK$2,754 HKD
$351 USD
As of October 30, 2026
Save HK$11,682 HKD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$14,436 HKD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.05ct lab-grown cushion diamond

This 1.05ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG818657598 or 818657598. Listed at 14 retailers as of October 30, 2026, with prices from HK$2,754 to HK$14,436, a HK$11,682 spread on the same certified stone. Brilliant Earth lists it at HK$14,436. 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

1.05
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle42.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818657598
Dimensions6.15 × 5.99 × 3.89 mm
L/W Ratio1.03
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
6.15 mm5.99 mm1.05 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818657598
Side View
Table 61.0%Crown 34.7°Girdle: THN-STKPavilion 42.2°Culet: NoneDepth 64.9%

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$14,436 HKD|Low: HK$2,205 HKD|High: HK$16,790 HKD|Avg: HK$7,710 HKD|-14.0%
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
October 31, 2026
Retailer 12HK$2,754 HKD
Retailer 6HK$3,374 HKD
Retailer 7HK$4,629 HKD
Retailer 13HK$4,966 HKD
Retailer 8HK$5,000 HKD
Retailer 11HK$5,013 HKD
Retailer 9HK$5,248 HKD
Retailer 2HK$5,398 HKD
Retailer 3HK$5,523 HKD
Retailer 14HK$10,179 HKD
Retailer 5HK$10,513 HKD
Retailer 10HK$12,218 HKD
Retailer 4HK$13,182 HKD
Brilliant EarthHK$14,436 HKD

36 data points across 14 retailers

14 retailersHK$2,754 HKD to HK$14,436 HKD

A
Cheapest Retailer
-
HK$2,754 HKD
$351 USD
Final sale: no returns
Retailer 2
-
HK$3,374 HKD
$430 USD
View
Price last confirmed 19 days ago
A
Retailer 3
-
HK$4,629 HKD
$590 USD
View
A
Retailer 4
-
HK$4,966 HKD
$633 USD
View
A
Retailer 5
-
HK$5,000 HKD
€607 EUR
View
A
Retailer 6
-
HK$5,013 HKD
$639 USD
View
A
Retailer 7
-
HK$5,248 HKD
ZAR 10,806 ZAR
View
A
Retailer 8
-
HK$5,398 HKD
£542 GBP
View
A
Retailer 9
-
HK$5,523 HKD
$704 USD
View
B
Retailer 10
-
HK$10,179 HKD
$1,297 USD
View
Retailer 11
-
HK$10,513 HKD
$1,340 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
HK$12,218 HKD
$1,557 USD
View
B
Retailer 13
-
HK$13,182 HKD
£1,323 GBP
View
Most Expensive
B
Brilliant Earth
21241761A · Oct 30
HK$14,436 HKD
$1,840 USD
View
13 more retailers have this diamond
Prices start from HK$2,754 HKDSave up to HK$11,682 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
1.05ct Cushion
HK$2,754 HKD