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Cushion|Lab Grown|IGI

1.28ct E FL Cushion Lab Grown Diamond

VG • E/FL • IGI LG831680109

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

Certificate IGI LG831680109

Diamond specifications and retailer prices

From HK$3,311 HKD
$422 USD
As of October 30, 2026
Save HK$17,953 HKD (84%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$21,264 HKD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 very-good cut grade and certified by IGI LG831680109 or 831680109. Listed at 9 retailers as of October 29, 2026, with prices from HK$3,311 to HK$21,264, a HK$17,953 spread on the same certified stone. Brilliant Earth lists it at HK$21,264. 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831680109
Dimensions6.10 × 6.07 × 4.05 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
6.10 mm6.07 mm1.28 ctE / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831680109
Side View
Table 60.0%Crown 36.7°Girdle: STK-VTKPavilion 36°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: Oct 30
Current: HK$21,264 HKD|Low: HK$3,311 HKD|High: HK$21,264 HKD|Avg: HK$9,558 HKD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 8HK$3,311 HKD
Retailer 2HK$3,886 HKD
Retailer 7HK$4,826 HKD
Retailer 3HK$6,624 HKD
Retailer 5HK$7,156 HKD
Retailer 6HK$12,081 HKD
Retailer 9HK$12,228 HKD
Retailer 4HK$14,084 HKD
Brilliant EarthHK$21,264 HKD

2 data points across 9 retailers

9 retailersHK$3,311 HKD to HK$21,264 HKD

A
Cheapest Retailer
-
HK$3,311 HKD
$422 USD
Final sale: no returns
A
Retailer 2
-
HK$3,886 HKD
£390 GBP
View
A
Retailer 3
-
HK$4,826 HKD
$615 USD
View
A
Retailer 4
-
HK$6,624 HKD
£665 GBP
View
A
Retailer 5
-
HK$7,156 HKD
$912 USD
View
B+
Retailer 6
-
HK$12,081 HKD
$1,540 USD
View
B+
Retailer 7
-
HK$12,228 HKD
SGD 2,106 SGD
View
B
Retailer 8
-
HK$14,084 HKD
$1,795 USD
View
Most Expensive
B
Brilliant Earth
22348455A · Oct 29
HK$21,264 HKD
$2,710 USD
View
8 more retailers have this diamond
Prices start from HK$3,311 HKDSave up to HK$17,953 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