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Cushion|Lab Grown|IGI

1.50ct F IF Cushion Lab Grown Diamond

ID • F/IF • IGI LG818683709

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818683709

Diamond specifications and retailer prices

From £359 GBP
As of November 6, 2026
Save £1,180 GBP (77%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,539 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818683709 or 818683709. Listed at 10 retailers as of November 6, 2026, with prices from £359 to £1,539, a £1,180 spread on the same certified stone. Brilliant Earth lists it at £1,539. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.50
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.1°
Pavilion angle36.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818683709
Dimensions7.26 × 6.19 × 4.07 mm
L/W Ratio1.17
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.26 mm6.19 mm1.50 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818683709
Side View
Table 64.0%Crown 40.1°Girdle: STK-THKPavilion 36.8°Culet: NoneDepth 65.8%

Caratlytics Score

How it works →
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: £1,539 GBP|Low: £359 GBP|High: £2,682 GBP|Avg: £1,318 GBP|-42.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 6£359 GBP
Retailer 2£435 GBP
Retailer 3£468 GBP
Retailer 8£739 GBP
Retailer 9£895 GBP
Retailer 4£1,067 GBP
Retailer 7£1,079 GBP
Retailer 10£1,117 GBP
Retailer 5£1,281 GBP
Brilliant Earth£1,539 GBP

45 data points across 10 retailers

10 retailers£359 GBP to £1,539 GBP

A
Cheapest Retailer
-
£359 GBP
A
Retailer 2
-
£435 GBP
View
A
Retailer 3
-
£468 GBP
View
A
Retailer 4
-
£739 GBP
View
A
Retailer 5
-
£895 GBP
View
A
Retailer 6
-
£1,067 GBP
View
Retailer 7
-
£1,079 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£1,117 GBP
View
B+
Retailer 9
-
£1,281 GBP
View
Most Expensive
B+
Brilliant Earth
22200346A · Nov 6
£1,539 GBP
$2,060 USD
View
9 more retailers have this diamond
Prices start from £359 GBPSave up to £1,180 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
1.50ct Cushion
£359 GBP