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Cushion|Lab Grown|IGI

1.38ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG799648028

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG799648028

Diamond specifications and retailer prices

From £290 GBP
$389 USD
As of November 3, 2026
Save £1,610 GBP (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,900 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 LG799648028 or 799648028. Listed at 16 retailers as of November 2, 2026, with prices from £290 to £1,900, a £1,610 spread on the same certified stone. Brilliant Earth lists it at £1,900. 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 angle33.7°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799648028
Dimensions8.09 × 5.77 × 3.71 mm
L/W Ratio1.40
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
8.09 mm5.77 mm1.38 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799648028
Side View
Table 61.0%Crown 33.7°Girdle: MED-STKPavilion 33.8°Culet: NoneDepth 64.3%

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: £1,900 GBP|Low: £290 GBP|High: £2,459 GBP|Avg: £969 GBP|-22.7%
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 8£290 GBP
Retailer 7£402 GBP
Retailer 4£576 GBP
Retailer 3£607 GBP
Retailer 11£628 GBP
Retailer 5£632 GBP
Retailer 9£663 GBP
Retailer 12£693 GBP
Retailer 6£771 GBP
Retailer 10£981 GBP
Retailer 2£1,064 GBP
Retailer 14£1,404 GBP
Retailer 13£1,476 GBP
Retailer 15£1,524 GBP
Brilliant Earth£1,900 GBP

34 data points across 15 retailers

16 retailers£290 GBP to £1,900 GBP

A
Cheapest Retailer
-
£290 GBP
$389 USD
Final sale: no returns
Retailer 2
-
£402 GBP
$539 USD
View
Price last confirmed 9 days ago
A
Retailer 3
-
£576 GBP
$773 USD
View
A
Retailer 4
-
£607 GBP
$815 USD
View
A
Retailer 5
-
£628 GBP
€802 EUR
View
A
Retailer 6
-
£632 GBP
$848 USD
View
A
Retailer 7
-
£663 GBP
View
A
Retailer 8
-
£693 GBP
ZAR 15,023 ZAR
View
A
Retailer 9
-
£771 GBP
$1,034 USD
View
B+
Retailer 10
-
£981 GBP
$1,317 USD
View
B+
Retailer 11
-
£1,064 GBP
$1,428 USD
View
B+
Retailer 12
-
£1,404 GBP
SGD 2,546 SGD
View
B+
Retailer 13
-
£1,476 GBP
View
B+
Retailer 14
-
£1,524 GBP
$2,045 USD
View
Retailer 15
-
£1,590 GBP
View
Price last confirmed 24 days ago
Most Expensive
B
Brilliant Earth
21420693A · Nov 2
£1,900 GBP
$2,550 USD
View
15 more retailers have this diamond
Prices start from £290 GBPSave up to £1,610 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
£290 GBP