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Cushion|Lab Grown|IGI

1.38ct G VS1 Cushion Lab Grown Diamond

EX • G/VS1 • IGI LG597375435

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG597375435

Diamond specifications and retailer prices

From £205 GBP
As of November 4, 2026
Save £820 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,025 GBP at Brilliant Earth · As of November 4, 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 G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG597375435 or 597375435. Listed at 13 retailers as of November 4, 2026, with prices from £205 to £1,025, a £820 spread on the same certified stone. Brilliant Earth lists it at £1,025. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.38
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG597375435
Dimensions6.31 × 6.24 × 4.08 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.31 mm6.24 mm1.38 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG597375435
Side View
Table 63.0%Crown 35.9°Girdle: MED-STKPavilion 34.7°Culet: NoneDepth 65.4%

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 4
Current: £1,025 GBP|Low: £205 GBP|High: £1,114 GBP|Avg: £530 GBP|-8.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 3£205 GBP
Retailer 8£377 GBP
Retailer 10£381 GBP
Retailer 7£392 GBP
Retailer 9£421 GBP
Retailer 2£427 GBP
Retailer 11£465 GBP
Retailer 5£556 GBP
Retailer 6£580 GBP
Retailer 4£909 GBP
Brilliant Earth£1,025 GBP

40 data points across 11 retailers

13 retailers£205 GBP to £1,025 GBP

A
Cheapest Retailer
-
£205 GBP
Final sale: no returns
A
Retailer 2
-
£377 GBP
View
A
Retailer 3
-
£381 GBP
View
A
Retailer 4
-
£392 GBP
View
B+
Retailer 5
-
£421 GBP
View
B+
Retailer 6
-
£427 GBP
View
B+
Retailer 7
-
£465 GBP
View
B+
Retailer 8
-
£556 GBP
View
B+
Retailer 9
-
£580 GBP
View
B
Retailer 10
-
£769 GBP
View
B
Retailer 11
-
£909 GBP
View
B
Retailer 12
-
£997 GBP
View
Most Expensive
B
Brilliant Earth
20602099A · Nov 4
£1,025 GBP
$1,380 USD
View
12 more retailers have this diamond
Prices start from £205 GBPSave up to £820 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
£205 GBP