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Cushion|Lab Grown|IGI

1.09ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG816624103

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

Certificate IGI LG816624103

Diamond specifications and retailer prices

From £293 GBP
$393 USD
As of October 30, 2026
Save £1,289 GBP (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,582 GBP at Brilliant Earth · As of October 31, 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 LG816624103 or 816624103. Listed at 13 retailers as of October 30, 2026, with prices from £293 to £1,582, a £1,289 spread on the same certified stone. Brilliant Earth lists it at £1,582. 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 angle35.2°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816624103
Dimensions6.25 × 6.10 × 3.89 mm
L/W Ratio1.02
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
6.25 mm6.10 mm1.09 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816624103
Side View
Table 61.0%Crown 35.2°Girdle: THN-STKPavilion 39.8°Culet: NoneDepth 63.8%

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: £1,582 GBP|Low: £216 GBP|High: £2,120 GBP|Avg: £800 GBP|-25.4%
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
October 31, 2026
Retailer 11£293 GBP
Retailer 4£336 GBP
Retailer 7£493 GBP
Retailer 10£507 GBP
Retailer 13£524 GBP
Retailer 2£525 GBP
Retailer 8£560 GBP
Retailer 6£587 GBP
Retailer 3£1,079 GBP
Retailer 5£1,082 GBP
Retailer 9£1,254 GBP
Retailer 12£1,276 GBP
Brilliant Earth£1,582 GBP

35 data points across 13 retailers

13 retailers£293 GBP to £1,582 GBP

A
Cheapest Retailer
-
£293 GBP
$393 USD
Final sale: no returns
A
Retailer 2
-
£336 GBP
$450 USD
View
A
Retailer 3
-
£493 GBP
$660 USD
View
A
Retailer 4
-
£507 GBP
$679 USD
View
A
Retailer 5
-
£524 GBP
$702 USD
View
A
Retailer 6
-
£525 GBP
€670 EUR
View
A
Retailer 7
-
£560 GBP
ZAR 12,131 ZAR
View
A
Retailer 8
-
£587 GBP
View
B+
Retailer 9
-
£1,079 GBP
$1,446 USD
View
Retailer 10
-
£1,082 GBP
$1,450 USD
View
Price last confirmed 13 days ago
B
Retailer 11
-
£1,254 GBP
$1,680 USD
View
B+
Retailer 12
-
£1,276 GBP
View
Most Expensive
B
Brilliant Earth
21018849A · Oct 31
£1,582 GBP
$2,120 USD
View
12 more retailers have this diamond
Prices start from £293 GBPSave up to £1,289 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
£293 GBP