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Round|Lab Grown|IGI

3.09ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG715540666

Shape and cutting style on the report: Round brilliant

Certificate IGI LG715540666

Diamond specifications and retailer prices

From £583 GBP
$777 USD
As of October 29, 2026
Save £8,007 GBP (93%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £8,591 GBP at Brilliant Earth · As of October 29, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG715540666 or 715540666. Listed at 26 retailers as of October 29, 2026, with prices from £583 to £8,591, a £8,007 spread on the same certified stone. Brilliant Earth lists it at £8,591. 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
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG715540666
Dimensions9.45 × 9.37 × 5.72 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.45 mm9.37 mm3.09 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG715540666
Side View
Table 58.0%Crown 34.9°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £8,591 GBP|Low: £635 GBP|High: £8,591 GBP|Avg: £2,277 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 19
October 29, 2026
Retailer 11£635 GBP
Retailer 6£653 GBP
Retailer 15£811 GBP
Retailer 7£1,094 GBP
Retailer 14£1,137 GBP
Retailer 2£1,144 GBP
Retailer 4£1,502 GBP
Retailer 18£1,609 GBP
Retailer 16£1,686 GBP
Retailer 12£1,735 GBP
Retailer 8£2,259 GBP
Retailer 9£2,285 GBP
Retailer 10£2,664 GBP
Retailer 5£2,666 GBP
Retailer 13£2,815 GBP
Retailer 19£3,522 GBP
Retailer 17£4,096 GBP
Retailer 3£5,181 GBP
Brilliant Earth£8,591 GBP

40 data points across 19 retailers

26 retailers£583 GBP to £8,591 GBP

A
Cheapest Retailer
-
£583 GBP
$777 USD
A
Retailer 2
-
£635 GBP
$845 USD
View
A
Retailer 3
-
£653 GBP
$869 USD
View
Final sale: no returns
A
Retailer 4
-
£677 GBP
$901 USD
View
Retailer 5
-
£677 GBP
$901 USD
View
Price last confirmed 12 days ago
A
Retailer 6
-
£811 GBP
$1,080 USD
View
A
Retailer 7
-
£923 GBP
HK$9,600 HKD
View
A
Retailer 8
-
£1,094 GBP
$1,457 USD
View
A
Retailer 9
-
£1,137 GBP
€1,442 EUR
View
A
Retailer 10
-
£1,144 GBP
View
A
Retailer 11
-
£1,265 GBP
$1,685 USD
View
A
Retailer 12
-
£1,502 GBP
A$3,078 AUD
View
A
Retailer 13
-
£1,609 GBP
$2,143 USD
View
Retailer 14
-
£1,686 GBP
A$3,454 AUD
View
Price last confirmed 8 days ago
A
Retailer 15
-
£1,735 GBP
ZAR 37,318 ZAR
View
A
Retailer 16
-
£2,100 GBP
$2,797 USD
View
A
Retailer 17
-
£2,259 GBP
$3,008 USD
View
B+
Retailer 18
-
£2,259 GBP
$3,009 USD
View
A
Retailer 19
-
£2,285 GBP
$3,043 USD
View
B+
Retailer 20
-
£2,664 GBP
SGD 4,794 SGD
View
B+
Retailer 21
-
£2,666 GBP
$3,550 USD
View
B+
Retailer 22
-
£2,815 GBP
View
Retailer 23
-
£3,522 GBP
A$7,216 AUD
View
Price last confirmed 21 days ago
Retailer 24
-
£4,096 GBP
$5,455 USD
View
Price last confirmed 8 days ago
B
Retailer 25
-
£5,181 GBP
$6,900 USD
View
Most Expensive
B
Brilliant Earth
19794198Y · Oct 29
£8,591 GBP
$11,440 USD
View
25 more retailers have this diamond
Prices start from £583 GBPSave up to £8,007 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 Round
£583 GBP