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Round|Lab Grown|IGI

0.40ct I SI2 Round Lab Grown Diamond

VG • I/SI2 • IGI LG299120

Certificate IGI LG299120

Diamond specifications and retailer prices

From £470 GBP
SGD 845 SGD
As of October 29, 2026
1 retailer carries this diamond
Only listing: £470 GBP at Fonder Diamond
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
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 I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG299120 or 299120. Listed at a single retailer as of October 29, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG299120
Dimensions4.76 × 4.79 mm
L/W Ratio1.01
Top View
4.76 mm4.79 mm0.40 ctI / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG299120
Side View
Table 59.0%CrownGirdle: MED - STKPavilionCulet: NDepth 60.4%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 29
Current: £470 GBP|Low: £241 GBP|High: £1,416 GBP|Avg: £588 GBP|-0.4%
Fonder Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 13, 2026
Retailer 2£241 GBP
Retailer 5£458 GBP
Retailer 4£466 GBP
Fonder Diamond£470 GBP
Retailer 6£475 GBP
Retailer 3£1,416 GBP

4 data points across 6 retailers

1 retailer

C
Fonder Diamond
97014711 · Oct 29
£470 GBP
SGD 845 SGD
View

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C
0.40ct Round
£470 GBP