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Cushion|Lab Grown|IGI

1.38ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG840629762

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840629762

Diamond specifications and retailer prices

From £385 GBP
$516 USD
As of November 3, 2026
Save £2,171 GBP (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,556 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.38ct lab-grown cushion diamond

This 1.38ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840629762 or 840629762. Listed at 15 retailers as of November 2, 2026, with prices from £385 to £2,556, a £2,171 spread on the same certified stone. Brilliant Earth lists it at £2,556. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.38
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840629762
Dimensions8.02 × 5.51 × 3.86 mm
L/W Ratio1.46
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
8.02 mm5.51 mm1.38 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840629762
Side View
Table 62.0%Crown 35.7°Girdle: STK-THKPavilion 36.5°Culet: NoneDepth 70.1%

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: Nov 3
Current: £2,556 GBP|Low: £385 GBP|High: £2,556 GBP|Avg: £1,019 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
Retailer 14
Retailer 15
November 3, 2026
Retailer 4£385 GBP
Retailer 11£423 GBP
Retailer 15£622 GBP
Retailer 7£645 GBP
Retailer 8£679 GBP
Retailer 14£685 GBP
Retailer 12£709 GBP
Retailer 3£773 GBP
Retailer 10£1,005 GBP
Retailer 2£1,181 GBP
Retailer 6£1,425 GBP
Retailer 9£1,509 GBP
Retailer 13£1,524 GBP
Retailer 5£1,942 GBP
Brilliant Earth£2,556 GBP

9 data points across 15 retailers

15 retailers£385 GBP to £2,556 GBP

A
Cheapest Retailer
-
£385 GBP
$516 USD
Final sale: no returns
A
Retailer 2
-
£423 GBP
View
A
Retailer 3
-
£622 GBP
$835 USD
View
A
Retailer 4
-
£645 GBP
$866 USD
View
A
Retailer 5
-
£679 GBP
View
A
Retailer 6
-
£685 GBP
€875 EUR
View
A
Retailer 7
-
£709 GBP
ZAR 15,361 ZAR
View
A
Retailer 8
-
£773 GBP
$1,037 USD
View
B+
Retailer 9
-
£1,005 GBP
$1,349 USD
View
B+
Retailer 10
-
£1,181 GBP
$1,585 USD
View
B+
Retailer 11
-
£1,425 GBP
SGD 2,585 SGD
View
B+
Retailer 12
-
£1,509 GBP
View
B
Retailer 13
-
£1,524 GBP
$2,045 USD
View
B
Retailer 14
-
£1,942 GBP
$2,606 USD
View
Most Expensive
B
Brilliant Earth
22310847A · Nov 2
£2,556 GBP
$3,430 USD
View
14 more retailers have this diamond
Prices start from £385 GBPSave up to £2,171 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
1.38ct Cushion
£385 GBP