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Cushion|Lab Grown|IGI

1.22ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG811602535

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG811602535

Diamond specifications and retailer prices

From £339 GBP
As of November 4, 2026
Save £1,261 GBP (79%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,600 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.22ct lab-grown cushion diamond

This 1.22ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811602535 or 811602535. Listed at 17 retailers as of November 4, 2026, with prices from £339 to £1,600, a £1,261 spread on the same certified stone. Brilliant Earth lists it at £1,600. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.22
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811602535
Dimensions7.19 × 5.69 × 3.87 mm
L/W Ratio1.26
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
7.19 mm5.69 mm1.22 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811602535
Side View
Table 61.0%Crown 32.1°Girdle: MED-STKPavilion 37.3°Culet: NoneDepth 68.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £1,600 GBP|Low: £339 GBP|High: £1,902 GBP|Avg: £877 GBP|-11.1%
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
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Retailer 17
November 4, 2026
Retailer 5£339 GBP
Retailer 16£376 GBP
Retailer 4£417 GBP
Retailer 13£485 GBP
Retailer 6£505 GBP
Retailer 3£547 GBP
Retailer 12£599 GBP
Retailer 2£612 GBP
Retailer 17£619 GBP
Retailer 10£648 GBP
Retailer 14£916 GBP
Retailer 15£1,193 GBP
Retailer 8£1,197 GBP
Retailer 9£1,234 GBP
Retailer 7£1,379 GBP
Retailer 11£1,468 GBP
Brilliant Earth£1,600 GBP

39 data points across 17 retailers

17 retailers£339 GBP to £1,600 GBP

A
Cheapest Retailer
-
£339 GBP
Final sale: no returns
Retailer 2
-
£376 GBP
View
Price last confirmed 10 days ago
A
Retailer 3
-
£417 GBP
View
A
Retailer 4
-
£485 GBP
View
A
Retailer 5
-
£505 GBP
View
A
Retailer 6
-
£547 GBP
View
A
Retailer 7
-
£599 GBP
View
A
Retailer 8
-
£612 GBP
View
A
Retailer 9
-
£619 GBP
View
A
Retailer 10
-
£648 GBP
View
B+
Retailer 11
-
£916 GBP
View
Retailer 12
-
£1,193 GBP
View
Price last confirmed 7 days ago
B
Retailer 13
-
£1,197 GBP
View
B
Retailer 14
-
£1,234 GBP
View
B
Retailer 15
-
£1,379 GBP
View
B
Retailer 16
-
£1,468 GBP
View
Most Expensive
B
Brilliant Earth
20512786A · Nov 4
£1,600 GBP
$2,160 USD
View
16 more retailers have this diamond
Prices start from £339 GBPSave up to £1,261 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
1.22ct Cushion
£339 GBP