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Round|Lab Grown|IGI

3.09ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG848664692

Shape and cutting style on the report: Round brilliant

Certificate IGI LG848664692

Diamond specifications and retailer prices

From £524 GBP
As of November 6, 2026
Save £1,074 GBP (67%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,597 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 3.09ct lab-grown round diamond

This 3.09ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG848664692 or 848664692. Listed at 3 retailers as of November 5, 2026, with prices from £524 to £1,597, a £1,074 spread on the same certified stone. Brilliant Earth lists it at £1,597. 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

3.09
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG848664692
Dimensions9.40 × 9.38 × 5.74 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.40 mm9.38 mm3.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG848664692
Side View
Table 55.0%Crown 33.3°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £1,597 GBP|Low: £524 GBP|High: £1,597 GBP|Avg: £1,197 GBP
Brilliant Earth
Retailer 2
Retailer 3
November 6, 2026
Retailer 2£524 GBP
Retailer 3£1,308 GBP
Brilliant Earth£1,597 GBP

7 data points across 3 retailers

3 retailers£524 GBP to £1,597 GBP

Cheapest Retailer
-
£524 GBP
B
Retailer 2
-
£1,308 GBP
View
Most Expensive
B
Brilliant Earth
22257970A · Nov 5
£1,597 GBP
$2,150 USD
View
2 more retailers have this diamond
Prices start from £524 GBPSave up to £1,074 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
3.09ct Round
£524 GBP