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Cushion|Lab Grown|IGI

1.09ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG840635024

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840635024

Diamond specifications and retailer prices

From £307 GBP
As of October 30, 2026
Save £1,144 GBP (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,451 GBP at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

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 standard cut grade and certified by IGI LG840635024 or 840635024. Listed at 15 retailers as of October 30, 2026, with prices from £307 to £1,451, a £1,144 spread on the same certified stone. Helzberg Diamonds lists it at £1,451. 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

1.09
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840635024
Dimensions7.59 × 5.18 × 3.47 mm
L/W Ratio1.47
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
7.59 mm5.18 mm1.09 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840635024
Side View
Table 63.0%Crown 35.9°Girdle: STK-THKPavilion 35.7°Culet: NoneDepth 67.0%

Caratlytics Score

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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 30
Current: £1,451 GBP|Low: £306 GBP|High: £1,642 GBP|Avg: £819 GBP|-1.3%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
October 31, 2026
Retailer 9£307 GBP
Retailer 14£437 GBP
Retailer 3£469 GBP
Retailer 5£471 GBP
Retailer 11£484 GBP
Retailer 13£497 GBP
Retailer 15£508 GBP
Retailer 10£515 GBP
Retailer 2£713 GBP
Retailer 6£792 GBP
Retailer 4£965 GBP
Retailer 7£1,041 GBP
Retailer 12£1,166 GBP
Retailer 8£1,366 GBP
Helzberg Diamonds£1,451 GBP

15 data points across 15 retailers

15 retailers£307 GBP to £1,451 GBP

A
Cheapest Retailer
-
£307 GBP
A
Retailer 2
-
£437 GBP
$585 USD
View
A
Retailer 3
-
£469 GBP
$629 USD
View
A
Retailer 4
-
£471 GBP
$631 USD
View
A
Retailer 5
-
£484 GBP
€618 EUR
View
A
Retailer 6
-
£497 GBP
ZAR 10,764 ZAR
View
A
Retailer 7
-
£508 GBP
$680 USD
View
A
Retailer 8
-
£515 GBP
View
B+
Retailer 9
-
£713 GBP
$955 USD
View
B+
Retailer 10
-
£792 GBP
SGD 1,434 SGD
View
B
Retailer 11
-
£965 GBP
$1,293 USD
View
Retailer 12
-
£1,041 GBP
$1,395 USD
View
Price last confirmed 12 days ago
B
Retailer 13
-
£1,166 GBP
View
B
Retailer 14
-
£1,366 GBP
$1,830 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJLGIK · Oct 30
£1,451 GBP
$1,944 USD
View
14 more retailers have this diamond
Prices start from £307 GBPSave up to £1,144 GBP

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
£307 GBP