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Cushion|Lab Grown|IGI

1.09ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG818663196

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

Certificate IGI LG818663196

Diamond specifications and retailer prices

From £282 GBP
$378 USD
As of October 30, 2026
Save £1,181 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,463 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

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 top-tier cut grade and certified by IGI LG818663196 or 818663196. Listed at 15 retailers as of October 30, 2026, with prices from £282 to £1,463, a £1,181 spread on the same certified stone. Brilliant Earth lists it at £1,463. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818663196
Dimensions5.98 × 5.97 × 4.01 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
5.98 mm5.97 mm1.09 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818663196
Side View
Table 60.0%Crown 35.2°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 67.2%

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 30
Current: £1,463 GBP|Low: £282 GBP|High: £1,694 GBP|Avg: £757 GBP|-13.7%
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
Retailer 15
October 30, 2026
Retailer 14£282 GBP
Retailer 2£332 GBP
Retailer 5£351 GBP
Retailer 15£505 GBP
Retailer 9£509 GBP
Retailer 13£513 GBP
Retailer 6£526 GBP
Retailer 11£538 GBP
Retailer 4£548 GBP
Retailer 8£561 GBP
Retailer 3£1,039 GBP
Retailer 7£1,041 GBP
Retailer 12£1,220 GBP
Retailer 10£1,262 GBP
Brilliant Earth£1,463 GBP

36 data points across 15 retailers

15 retailers£282 GBP to £1,463 GBP

A
Cheapest Retailer
-
£282 GBP
$378 USD
Final sale: no returns
A
Retailer 2
-
£332 GBP
View
A
Retailer 3
-
£351 GBP
$470 USD
View
A
Retailer 4
-
£505 GBP
$677 USD
View
A
Retailer 5
-
£509 GBP
€650 EUR
View
A
Retailer 6
-
£513 GBP
$687 USD
View
A
Retailer 7
-
£526 GBP
$705 USD
View
A
Retailer 8
-
£538 GBP
ZAR 11,646 ZAR
View
A
Retailer 9
-
£548 GBP
$734 USD
View
A
Retailer 10
-
£561 GBP
View
B+
Retailer 11
-
£1,039 GBP
$1,392 USD
View
Retailer 12
-
£1,041 GBP
$1,395 USD
View
Price last confirmed 11 days ago
B
Retailer 13
-
£1,220 GBP
$1,635 USD
View
B+
Retailer 14
-
£1,262 GBP
View
Most Expensive
B
Brilliant Earth
21242470A · Oct 30
£1,463 GBP
$1,960 USD
View
14 more retailers have this diamond
Prices start from £282 GBPSave up to £1,181 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
£282 GBP