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Round|Lab Grown|IGI

0.31ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG301449

Certificate IGI LG301449

Diamond specifications and retailer prices

From £388 GBP
As of October 30, 2026
Save £25 GBP (6%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £413 GBP at Fonder Diamond · As of October 31, 2026
View at Fonder Diamond

About this 0.31ct lab-grown round diamond

This 0.31ct lab-grown round sits in the sub-half-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG301449 or 301449. Listed at 2 retailers as of October 30, 2026, with a relatively tight 6% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

0.31
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG301449
Dimensions4.36 × 4.34 × 2.72 mm
L/W Ratio1.00
Top View
4.36 mm4.34 mm0.31 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG301449
Side View
Table 59.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: £413 GBP|Low: £347 GBP|High: £680 GBP|Avg: £441 GBP|-0.4%
Fonder Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 13, 2026
Retailer 4£347 GBP
Retailer 6£351 GBP
Retailer 3£388 GBP
Fonder Diamond£413 GBP
Retailer 5£466 GBP
Retailer 2£680 GBP

4 data points across 6 retailers

2 retailers£388 GBP to £413 GBP

B
Cheapest Retailer
-
£388 GBP
Most Expensive
B
Fonder Diamond
96942014 · Oct 31
£413 GBP
SGD 747 SGD
View
1 more retailer has this diamond
Prices start from £388 GBPSave up to £25 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
0.31ct Round
£388 GBP