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Oval|Lab Grown|IGI

0.40ct D FL Oval Lab Grown Diamond

EX • D/FL • IGI LG839698278

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG839698278

Diamond specifications and retailer prices

From £227 GBP
$305 USD
As of November 1, 2026
Save £901 GBP (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,171 GBP at Riddles Jewelry · As of November 2, 2026
View at Riddles Jewelry

About this 0.4ct lab-grown oval diamond

This 0.4ct lab-grown oval sits in the sub-half-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG839698278 or 839698278. Listed at 16 retailers as of November 1, 2026, with a 396% 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
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839698278
Dimensions6.11 × 4.15 × 2.51 mm
L/W Ratio1.47
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
6.11 mm4.15 mm0.40 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839698278
Side View
Table 60.0%Crown 33.6°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 60.5%

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 1
Current: £496 GBP|Low: £227 GBP|High: £1,171 GBP|Avg: £599 GBP|+0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
Riddles Jewelry
November 2, 2026
Retailer 14£227 GBP
Retailer 4£263 GBP
Retailer 15£279 GBP
Retailer 2£282 GBP
Retailer 13£282 GBP
Retailer 7£401 GBP
Retailer 10£441 GBP
Retailer 12£447 GBP
Retailer 1£496 GBP
Retailer 8£511 GBP
Retailer 11£601 GBP
Retailer 3£905 GBP
Retailer 5£940 GBP
Retailer 6£992 GBP
Retailer 9£1,128 GBP
Riddles Jewelry£1,171 GBP

30 data points across 16 retailers

16 retailers£227 GBP to £1,128 GBP

A
Cheapest Retailer
-
£227 GBP
$305 USD
B+
Retailer 2
-
£263 GBP
$353 USD
View
B+
Retailer 3
-
£279 GBP
$374 USD
View
Final sale: no returns
B+
Retailer 4
-
£282 GBP
$378 USD
View
Retailer 5
-
£282 GBP
$378 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£401 GBP
$538 USD
View
B+
Retailer 7
-
£441 GBP
€563 EUR
View
B+
Retailer 8
-
£447 GBP
$600 USD
View
B+
Retailer 9
-
£496 GBP
View
B+
Retailer 10
-
£511 GBP
ZAR 11,074 ZAR
View
B
Retailer 11
-
£601 GBP
$806 USD
View
B
Retailer 12
-
£905 GBP
$1,214 USD
View
B
Retailer 13
-
£940 GBP
$1,261 USD
View
B
Retailer 14
-
£992 GBP
CA$1,848 CAD
View
B
Retailer 15
-
£1,128 GBP
View
Most Expensive
Riddles Jewelry
1987846445 · Nov 2
£1,171 GBP
$1,571 USD
View
Price under review
15 more retailers have this diamond
Prices start from £227 GBPSave up to £901 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 Oval
£227 GBP