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 $592 USD
As of October 29, 2026
Save $1,653 USD (74%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,755 USD 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $2,755 USD|Low: $422 USD|High: $2,774 USD|Avg: $1,298 USD|+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 7$592 USD
Retailer 8$717 USD
Retailer 4$760 USD
Retailer 6$938 USD
Retailer 2$1,012 USD
Retailer 5$1,017 USD
Retailer 9$1,078 USD
Retailer 3$1,995 USD
Retailer 10$2,245 USD
MOH London$2,755 USD

29 data points across 10 retailers

12 retailers$592 USD to $2,245 USD

A
Cheapest Retailer
-
$592 USD
Final sale: no returns
Retailer 2
-
$717 USD
HK$5,600 HKD
View
Price last confirmed 47 days ago
B+
Retailer 3
-
$760 USD
View
B+
Retailer 4
-
$938 USD
View
B+
Retailer 5
-
$1,012 USD
£797 GBP
View
Retailer 6
-
$1,013 USD
£798 GBP
View
Price last confirmed 10 days ago
B+
Retailer 7
-
$1,017 USD
View
B+
Retailer 8
-
$1,078 USD
View
Retailer 9
-
$1,995 USD
View
Price last confirmed 11 days ago
B
Retailer 10
-
$2,133 USD
View
B
Retailer 11
-
$2,245 USD
View
Most Expensive
MOH London
LG544281289 · Oct 18
$2,755 USD
£2,169 GBP
View
Price last confirmed 12 days ago
11 more retailers have this diamond
Prices start from $592 USDSave up to $1,653 USD

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
$592 USD