Cushion|Lab Grown|IGI

0.40ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG749509394

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG749509394

Diamond specifications and retailer prices

From £161 GBP
$216 USD
As of October 30, 2026
Save £615 GBP (79%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £842 GBP at Flawless Fine Jewelry · As of October 19, 2026
View at Flawless Fine Jewelry

About this 0.4ct lab-grown cushion diamond

This 0.4ct lab-grown cushion sits in the sub-half-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG749509394 or 749509394. Listed at 13 retailers as of October 30, 2026, with a 381% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.40
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749509394
Dimensions4.65 × 3.90 × 4.65 mm
L/W Ratio1.19
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
4.65 mm3.90 mm0.40 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749509394
Side View
Table 61.0%Crown 34.6°Girdle: THN-STKPavilion 36.4°Culet: NoneDepth 67.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £842 GBP|Low: £161 GBP|High: £853 GBP|Avg: £489 GBP|+4.2%
Flawless Fine Jewelry
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
October 30, 2026
Retailer 4£161 GBP
Retailer 5£231 GBP
Retailer 6£273 GBP
Retailer 10£290 GBP
Retailer 14£363 GBP
Retailer 13£364 GBP
Retailer 7£381 GBP
Retailer 11£418 GBP
Retailer 3£527 GBP
Retailer 12£646 GBP
Retailer 8£755 GBP
Retailer 2£776 GBP
Retailer 9£776 GBP
Flawless Fine Jewelry£842 GBP

30 data points across 14 retailers

13 retailers£161 GBP to £776 GBP

A
Cheapest Retailer
-
£161 GBP
$216 USD
A
Retailer 2
-
£231 GBP
$310 USD
View
A
Retailer 3
-
£290 GBP
ZAR 6,288 ZAR
View
A
Retailer 4
-
£363 GBP
A$748 AUD
View
A
Retailer 5
-
£364 GBP
$488 USD
View
B+
Retailer 6
-
£381 GBP
€486 EUR
View
B+
Retailer 7
-
£418 GBP
A$862 AUD
View
B+
Retailer 8
-
£527 GBP
CA$980 CAD
View
B+
Retailer 9
-
£646 GBP
$866 USD
View
B
Retailer 10
-
£755 GBP
View
B
Retailer 11
-
£776 GBP
$1,040 USD
View
B
Retailer 12
-
£776 GBP
$1,040 USD
View
Most Expensive
Flawless Fine Jewelry
4E2FC57DB · Oct 19
£842 GBP
View
Price last confirmed 11 days ago
12 more retailers have this diamond
Prices start from £161 GBPSave up to £615 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
0.40ct Cushion
£161 GBP