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Cushion|Lab Grown|IGI

1.09ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG818653702

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818653702

Diamond specifications and retailer prices

From £361 GBP
$484 USD
As of October 25, 2026
Save £1,437 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,799 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 very-good cut grade and certified by IGI LG818653702 or 818653702. Listed at 13 retailers as of October 25, 2026, with prices from £361 to £1,799, a £1,437 spread on the same certified stone. Brilliant Earth lists it at £1,799. 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
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818653702
Dimensions7.71 × 5.03 × 3.46 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
7.71 mm5.03 mm1.09 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818653702
Side View
Table 62.0%Crown 34.7°Girdle: MED-VTKPavilion 37.4°Culet: NoneDepth 68.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 25
Current: £1,799 GBP|Low: £361 GBP|High: £2,187 GBP|Avg: £942 GBP|-17.7%
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
October 31, 2026
Retailer 10£361 GBP
Retailer 11£516 GBP
Retailer 9£519 GBP
Retailer 2£569 GBP
Retailer 13£575 GBP
Retailer 6£593 GBP
Retailer 8£621 GBP
Retailer 3£865 GBP
Retailer 4£958 GBP
Retailer 5£1,082 GBP
Retailer 12£1,190 GBP
Retailer 7£1,420 GBP
Brilliant Earth£1,799 GBP

39 data points across 13 retailers

13 retailers£361 GBP to £1,799 GBP

A
Cheapest Retailer
-
£361 GBP
$484 USD
A
Retailer 2
-
£516 GBP
$692 USD
View
A
Retailer 3
-
£519 GBP
$695 USD
View
A
Retailer 4
-
£569 GBP
€726 EUR
View
A
Retailer 5
-
£575 GBP
$771 USD
View
A
Retailer 6
-
£593 GBP
View
A
Retailer 7
-
£621 GBP
ZAR 13,448 ZAR
View
B+
Retailer 8
-
£865 GBP
$1,159 USD
View
B+
Retailer 9
-
£958 GBP
SGD 1,735 SGD
View
Retailer 10
-
£1,082 GBP
$1,450 USD
View
Price last confirmed 13 days ago
B
Retailer 11
-
£1,190 GBP
$1,594 USD
View
B
Retailer 12
-
£1,420 GBP
View
Most Expensive
B
Brilliant Earth
21421259A · Oct 30
£1,799 GBP
$2,410 USD
View
12 more retailers have this diamond
Prices start from £361 GBPSave up to £1,437 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
£361 GBP