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Cushion|Lab Grown|IGI

3.09ct E SI1 Cushion Lab Grown Diamond

GD • E/SI1 • IGI LG544281289

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG544281289

Diamond specifications and retailer prices

From HK$4,645 HKD
$592 USD
As of October 29, 2026
Save HK$12,967 HKD (74%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$21,612 HKD at MOH London · As of October 18, 2026
View at MOH London

About this 3.09ct lab-grown cushion diamond

This 3.09ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG544281289 or 544281289. Listed at 12 retailers as of October 29, 2026, with a 279% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.09
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG544281289
Dimensions8.50 × 8.28 × 5.21 mm
L/W Ratio1.03
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
8.50 mm8.28 mm3.09 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG544281289
Side View
Table 57.5%Crown 32.9°Girdle: MED-THKPavilion 33.7°Culet: NoneDepth 62.9%

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 29
Current: HK$21,612 HKD|Low: HK$3,311 HKD|High: HK$21,761 HKD|Avg: HK$10,186 HKD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 28, 2026
Retailer 7HK$4,645 HKD
Retailer 8HK$5,624 HKD
Retailer 4HK$5,963 HKD
Retailer 6HK$7,359 HKD
Retailer 2HK$7,941 HKD
Retailer 5HK$7,979 HKD
Retailer 9HK$8,458 HKD
Retailer 3HK$15,652 HKD
Retailer 10HK$17,611 HKD
MOH LondonHK$21,612 HKD

29 data points across 10 retailers

12 retailersHK$4,645 HKD to HK$17,611 HKD

A
Cheapest Retailer
-
HK$4,645 HKD
$592 USD
Final sale: no returns
Retailer 2
-
HK$5,624 HKD
View
Price last confirmed 47 days ago
B+
Retailer 3
-
HK$5,963 HKD
$760 USD
View
B+
Retailer 4
-
HK$7,359 HKD
$938 USD
View
B+
Retailer 5
-
HK$7,941 HKD
£797 GBP
View
Retailer 6
-
HK$7,952 HKD
£798 GBP
View
Price last confirmed 10 days ago
B+
Retailer 7
-
HK$7,979 HKD
$1,017 USD
View
B+
Retailer 8
-
HK$8,458 HKD
$1,078 USD
View
Retailer 9
-
HK$15,652 HKD
$1,995 USD
View
Price last confirmed 11 days ago
B
Retailer 10
-
HK$16,735 HKD
$2,133 USD
View
B
Retailer 11
-
HK$17,611 HKD
$2,245 USD
View
Most Expensive
MOH London
LG544281289 · Oct 18
HK$21,612 HKD
£2,169 GBP
View
Price last confirmed 12 days ago
11 more retailers have this diamond
Prices start from HK$4,645 HKDSave up to HK$12,967 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
3.09ct Cushion
HK$4,645 HKD