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Round|Lab Grown|IGI

3.09ct G IF Round Lab Grown Diamond

ID • G/IF • IGI LG750596146

Shape and cutting style on the report: Round brilliant

Certificate IGI LG750596146

Diamond specifications and retailer prices

From £823 GBP
$1,103 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: £823 GBP at William & Sons Jewelers
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 William & Sons Jewelers

About this 3.09ct lab-grown round diamond

This 3.09ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG750596146 or 750596146. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG750596146
Dimensions9.45 × 9.39 × 5.70 mm
L/W Ratio1.01
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II Faint Blue
Top View
9.45 mm9.39 mm3.09 ctG / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG750596146
Side View
Table 58.0%Crown 34.5°Girdle: THN-MEDPavilion 40.7°Culet: NoneDepth 60.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £4,403 GBP|Low: £585 GBP|High: £6,777 GBP|Avg: £2,049 GBP|-35.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
William & Sons Jewelers
September 28, 2026
William & Sons Jewelers£823 GBP
Retailer 4£881 GBP
Retailer 5£901 GBP
Retailer 7£1,008 GBP
Retailer 11£1,127 GBP
Retailer 8£1,359 GBP
Retailer 9£1,779 GBP
Retailer 6£1,904 GBP
Retailer 10£2,342 GBP
Retailer 2£2,757 GBP
Retailer 3£3,052 GBP
Retailer 1£4,403 GBP

59 data points across 12 retailers

1 retailer

A
William & Sons Jewelers
cert_LG750596146 · Oct 31
£823 GBP
$1,103 USD
View
Final sale: no returns

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A
3.09ct Round
£823 GBP