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Cushion|Lab Grown|IGI

1.50ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG798603812

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG798603812

Diamond specifications and retailer prices

From £365 GBP
$486 USD
As of October 30, 2026
Save £1,783 GBP (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £2,148 GBP at Brilliant Earth · As of October 29, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG798603812 or 798603812. Listed at 19 retailers as of October 29, 2026, with prices from £365 to £2,148, a £1,783 spread on the same certified stone. Brilliant Earth lists it at £2,148. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.50
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG798603812
Dimensions7.70 × 6.02 × 3.86 mm
L/W Ratio1.28
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
7.70 mm6.02 mm1.50 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG798603812
Side View
Table 62.0%Crown 34.4°Girdle: MED-STKPavilion 34.9°Culet: NoneDepth 64.1%

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: £2,148 GBP|Low: £365 GBP|High: £2,275 GBP|Avg: £1,023 GBP|-5.6%
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
Retailer 16
Retailer 17
October 30, 2026
Retailer 8£365 GBP
Retailer 6£405 GBP
Retailer 7£542 GBP
Retailer 13£544 GBP
Retailer 11£621 GBP
Retailer 16£640 GBP
Retailer 2£668 GBP
Retailer 12£695 GBP
Retailer 3£789 GBP
Retailer 10£942 GBP
Retailer 15£978 GBP
Retailer 9£1,160 GBP
Retailer 5£1,324 GBP
Retailer 17£1,458 GBP
Retailer 14£1,488 GBP
Retailer 4£1,514 GBP
Brilliant Earth£2,148 GBP

39 data points across 17 retailers

19 retailers£365 GBP to £2,148 GBP

A
Cheapest Retailer
-
£365 GBP
$486 USD
Final sale: no returns
A
Retailer 2
-
£405 GBP
$539 USD
View
A
Retailer 3
-
£542 GBP
$722 USD
View
A
Retailer 4
-
£544 GBP
$725 USD
View
A
Retailer 5
-
£621 GBP
€787 EUR
View
A
Retailer 6
-
£640 GBP
$852 USD
View
A
Retailer 7
-
£668 GBP
View
A
Retailer 8
-
£695 GBP
ZAR 14,958 ZAR
View
A
Retailer 9
-
£789 GBP
$1,051 USD
View
A
Retailer 10
-
£942 GBP
A$1,930 AUD
View
A
Retailer 11
-
£978 GBP
$1,302 USD
View
Retailer 12
-
£1,160 GBP
A$2,376 AUD
View
Price last confirmed 22 days ago
B+
Retailer 13
-
£1,262 GBP
$1,680 USD
View
B+
Retailer 14
-
£1,324 GBP
$1,764 USD
View
B+
Retailer 15
-
£1,458 GBP
$1,942 USD
View
B+
Retailer 16
-
£1,488 GBP
View
B+
Retailer 17
-
£1,514 GBP
$2,016 USD
View
B
Retailer 18
-
£2,089 GBP
View
Most Expensive
B
Brilliant Earth
19012551A · Oct 29
£2,148 GBP
$2,860 USD
View
18 more retailers have this diamond
Prices start from £365 GBPSave up to £1,783 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
£365 GBP