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Round|Lab Grown|IGI

0.40ct F SI2 Round Lab Grown Diamond

EX • F/SI2 • IGI LG290500

Certificate IGI LG290500

Diamond specifications and retailer prices

From €357 EUR
$400 USD
As of November 2, 2026
Save €295 EUR (45%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €652 EUR at Fonder Diamond · As of October 31, 2026
View at Fonder Diamond

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG290500 or 290500. Listed at 2 retailers as of October 31, 2026, with prices from €357 to €652, a €295 spread on the same certified stone. Fonder Diamond lists it at €652. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.40
Carat
F
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG290500
Dimensions4.73 × 4.71 × 2.90 mm
L/W Ratio1.00
Top View
4.73 mm4.71 mm0.40 ctF / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG290500
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: €652 EUR|Low: €357 EUR|High: €1,439 EUR|Avg: €666 EUR|-0.4%
Fonder Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 13, 2026
Retailer 2€357 EUR
Retailer 3€441 EUR
Retailer 5€490 EUR
Retailer 6€616 EUR
Fonder Diamond€652 EUR
Retailer 4€1,439 EUR

4 data points across 6 retailers

2 retailers€357 EUR to €652 EUR

B+
Cheapest Retailer
-
€357 EUR
$400 USD
Most Expensive
B
Fonder Diamond
96961304 · Oct 31
€652 EUR
SGD 988 SGD
View
1 more retailer has this diamond
Prices start from €357 EURSave up to €295 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.

B+
0.40ct Round
€357 EUR