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Cushion|Lab Grown|IGI

1.33ct F IF Cushion Lab Grown Diamond

ID • F/IF • IGI LG656488124

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

Certificate IGI LG656488124

Diamond specifications and retailer prices

From £241 GBP
As of November 6, 2026
Save £999 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,830 GBP at Brilliant Earth · As of October 8, 2026
View at Brilliant Earth

About this 1.33ct lab-grown cushion diamond

This 1.33ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG656488124 or 656488124. Listed at 15 retailers as of November 1, 2026, with a 414% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.33
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG656488124
Dimensions6.47 × 6.43 × 4.18 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
6.47 mm6.43 mm1.33 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG656488124
Side View
Table 61.0%Crown 33.6°Girdle: MED-STKPavilion 38.7°Culet: NoneDepth 65.0%

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: Nov 6
Current: £1,830 GBP|Low: £241 GBP|High: £1,830 GBP|Avg: £625 GBP
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
November 7, 2026
Retailer 5£241 GBP
Retailer 4£267 GBP
Retailer 6£280 GBP
Retailer 13£359 GBP
Retailer 10£385 GBP
Retailer 3£436 GBP
Retailer 2£452 GBP
Retailer 7£467 GBP
Retailer 9£654 GBP
Retailer 12£666 GBP
Retailer 8£1,066 GBP
Retailer 11£1,240 GBP
Brilliant Earth£1,830 GBP

43 data points across 13 retailers

15 retailers£241 GBP to £1,240 GBP

A
Cheapest Retailer
-
£241 GBP
Final sale: no returns
Retailer 2
-
£267 GBP
View
Price last confirmed 13 days ago
A
Retailer 3
-
£280 GBP
View
A
Retailer 4
-
£359 GBP
View
A
Retailer 5
-
£385 GBP
View
A
Retailer 6
-
£452 GBP
View
A
Retailer 7
-
£456 GBP
View
A
Retailer 8
-
£467 GBP
View
A
Retailer 9
-
£654 GBP
View
A
Retailer 10
-
£666 GBP
View
A
Retailer 11
-
£724 GBP
View
B+
Retailer 12
-
£894 GBP
View
B+
Retailer 13
-
£1,066 GBP
View
B+
Retailer 14
-
£1,240 GBP
View
Most Expensive
Brilliant Earth
21385464A · Oct 8
£1,830 GBP
$2,450 USD
View
Price last confirmed 29 days ago
14 more retailers have this diamond
Prices start from £241 GBPSave up to £999 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
1.33ct Cushion
£241 GBP