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Round|Lab Grown|IGI

0.40ct H SI2 Round Lab Grown Diamond

VG • H/SI2 • IGI LGT-5398

Certificate IGI LGT-5398

Diamond specifications and retailer prices

From €448 EUR
£394 GBP
As of October 30, 2026
Save €150 EUR (25%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €597 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LGT-5398 or T-5398. Listed at 2 retailers as of October 30, 2026, with prices from €448 to €597, a €150 spread on the same certified stone. Fonder Diamond lists it at €597. 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
H
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LGT-5398
Dimensions4.67 × 4.70 mm
L/W Ratio1.01
Top View
4.67 mm4.70 mm0.40 ctH / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LGT-5398
Side View
Table 56.0%CrownGirdle: MED - STKPavilionCulet: NDepth 62.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €597 EUR|Low: €327 EUR|High: €1,279 EUR|Avg: €589 EUR|-0.4%
Fonder Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 13, 2026
Retailer 5€327 EUR
Retailer 2€358 EUR
Retailer 4€448 EUR
Retailer 7€483 EUR
Fonder Diamond€597 EUR
Retailer 6€629 EUR
Retailer 3€1,279 EUR

3 data points across 7 retailers

2 retailers€448 EUR to €597 EUR

B
Cheapest Retailer
-
€448 EUR
£394 GBP
Most Expensive
B
Fonder Diamond
96982311 · Oct 31
€597 EUR
SGD 902 SGD
View
1 more retailer has this diamond
Prices start from €448 EURSave up to €150 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
€448 EUR