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Round|Lab Grown|IGI

0.40ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG459129403

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459129403

Diamond specifications and retailer prices

From €221 EUR
$248 USD
As of November 1, 2026
Save €877 EUR (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €1,098 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 0.4ct lab-grown round diamond

This 0.4ct lab-grown round sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG459129403 or 459129403. Listed at 10 retailers as of November 1, 2026, with prices from €221 to €1,098, a €877 spread on the same certified stone. MOH London lists it at €1,098. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459129403
Dimensions4.66 × 4.70 × 2.86 mm
L/W Ratio1.01
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
4.66 mm4.70 mm0.40 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG459129403
Side View
Table 61.5%Crown 37.2°Girdle: MED-STKPavilion 40°Culet: NoneDepth 61.0%

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: €1,098 EUR|Low: €212 EUR|High: €1,112 EUR|Avg: €442 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 5€221 EUR
Retailer 3€232 EUR
Retailer 8€257 EUR
Retailer 6€275 EUR
Retailer 9€369 EUR
Retailer 7€459 EUR
Retailer 2€520 EUR
Retailer 4€521 EUR
MOH London€1,098 EUR

40 data points across 9 retailers

10 retailers€221 EUR to €1,098 EUR

A
Cheapest Retailer
-
€221 EUR
$248 USD
A
Retailer 2
-
€232 EUR
$260 USD
View
B+
Retailer 3
-
€257 EUR
$288 USD
View
B+
Retailer 4
-
€275 EUR
$308 USD
View
Retailer 5
-
€275 EUR
$308 USD
View
Price last confirmed 8 days ago
B
Retailer 6
-
€459 EUR
$515 USD
View
B
Retailer 7
-
€520 EUR
£459 GBP
View
B
Retailer 8
-
€521 EUR
View
B
Retailer 9
-
€882 EUR
$989 USD
View
Most Expensive
B
MOH London
LG459129403 · Nov 1
€1,098 EUR
£970 GBP
View
9 more retailers have this diamond
Prices start from €221 EURSave up to €877 EUR

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 Round
€221 EUR