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Cushion|Lab Grown|IGI

1.09ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846663309

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846663309

Diamond specifications and retailer prices

From £331 GBP
As of October 30, 2026
Save £1,430 GBP (81%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,761 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 D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846663309 or 846663309. Listed at 8 retailers as of October 30, 2026, with prices from £331 to £1,761, a £1,430 spread on the same certified stone. Brilliant Earth lists it at £1,761. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663309
Dimensions7.98 × 5.20 × 3.48 mm
L/W Ratio1.53
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
7.98 mm5.20 mm1.09 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663309
Side View
Table 63.0%Crown 33.7°Girdle: STK-THKPavilion 35.3°Culet: NoneDepth 66.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £1,761 GBP|Low: £331 GBP|High: £2,120 GBP|Avg: £849 GBP|-16.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 6£331 GBP
Retailer 3£433 GBP
Retailer 5£516 GBP
Retailer 2£520 GBP
Retailer 8£645 GBP
Retailer 4£1,284 GBP
Retailer 7£1,394 GBP
Brilliant Earth£1,761 GBP

6 data points across 8 retailers

8 retailers£331 GBP to £1,761 GBP

A
Cheapest Retailer
-
£331 GBP
A
Retailer 2
-
£433 GBP
$580 USD
View
A
Retailer 3
-
£516 GBP
$691 USD
View
A
Retailer 4
-
£520 GBP
$697 USD
View
A
Retailer 5
-
£645 GBP
€823 EUR
View
B+
Retailer 6
-
£1,284 GBP
$1,721 USD
View
B
Retailer 7
-
£1,394 GBP
View
Most Expensive
B
Brilliant Earth
22315344A · Oct 30
£1,761 GBP
$2,360 USD
View
7 more retailers have this diamond
Prices start from £331 GBPSave up to £1,430 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
£331 GBP