Radiant|Lab Grown|IGI

3.09ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG645408018

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG645408018

Diamond specifications and retailer prices

From £372 GBP
$494 USD
As of October 27, 2026
Save £842 GBP (69%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,214 GBP at NZ Jewellers · As of October 28, 2026
View at NZ Jewellers

About this 3.09ct lab-grown radiant diamond

This 3.09ct lab-grown radiant sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG645408018 or 645408018. Listed at 6 retailers as of October 27, 2026, with prices from £372 to £1,214, a £842 spread on the same certified stone. NZ Jewellers lists it at £1,214. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.09
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.1°
Pavilion angle33.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645408018
Dimensions10.39 × 7.13 × 4.79 mm
L/W Ratio1.46
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.39 mm7.13 mm3.09 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645408018
Side View
Table 64.0%Crown 40.1°Girdle: MediumPavilion 33.2°Culet: NoneDepth 67.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: £372 GBP|Low: £357 GBP|High: £3,944 GBP|Avg: £1,053 GBP|+4.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
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Retailer 14
October 8, 2026
Retailer 1£372 GBP
Retailer 5£425 GBP
Retailer 7£461 GBP
Retailer 9£492 GBP
Retailer 3£512 GBP
Retailer 13£536 GBP
Retailer 11£649 GBP
Retailer 4£765 GBP
Retailer 10£872 GBP
Retailer 6£1,014 GBP
Retailer 12£1,365 GBP
Retailer 2£1,410 GBP
Retailer 14£1,732 GBP
Retailer 8£3,944 GBP

3 data points across 14 retailers

6 retailers£372 GBP to £1,214 GBP

A
Cheapest Retailer
-
£372 GBP
$494 USD
A
Retailer 2
-
£417 GBP
$554 USD
View
A
Retailer 3
-
£461 GBP
$613 USD
View
Price last confirmed 12 days ago
A
Retailer 4
-
£461 GBP
$613 USD
View
B+
Retailer 5
-
£1,194 GBP
View
Most Expensive
B+
NZ Jewellers
2e40f88f-b4b0-4561-843f-b1598de75018 · Oct 28
£1,214 GBP
$1,613 USD
View
5 more retailers have this diamond
Prices start from £372 GBPSave up to £842 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.

A
3.09ct Radiant
£372 GBP