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Round|Lab Grown|IGI

0.50ct J SI2 Round Lab Grown Diamond

EX • J/SI2 • IGI LG300906

Certificate IGI LG300906

Diamond specifications and retailer prices

From £398 GBP
$530 USD
As of October 28, 2026
Save £125 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £523 GBP at Fonder Diamond · As of October 29, 2026
View at Fonder Diamond

About this 0.5ct lab-grown round diamond

This 0.5ct lab-grown round sits in the half to three-quarter carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG300906 or 300906. Listed at 2 retailers as of October 28, 2026, with prices from £398 to £523, a £125 spread on the same certified stone. Fonder Diamond lists it at £523. 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

0.50
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginLab Grown
Grading LabIGI
CertificateIGI LG300906
Dimensions5.06 × 5.03 × 3.17 mm
L/W Ratio1.01
Top View
5.06 mm5.03 mm0.50 ctJ / SI2
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateIGI LG300906
Side View
Table 55.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 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 28
Current: £523 GBP|Low: £281 GBP|High: £1,031 GBP|Avg: £591 GBP|-0.4%
Fonder Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 13, 2026
Retailer 3£281 GBP
Retailer 2£398 GBP
Fonder Diamond£523 GBP
Retailer 5£638 GBP
Retailer 6£673 GBP
Retailer 4£1,031 GBP

5 data points across 6 retailers

2 retailers£398 GBP to £523 GBP

B
Cheapest Retailer
-
£398 GBP
$530 USD
Most Expensive
B
Fonder Diamond
73654376 · Oct 29
£523 GBP
SGD 941 SGD
View
1 more retailer has this diamond
Prices start from £398 GBPSave up to £125 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.

B
0.50ct Round
£398 GBP