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Round|Lab Grown|IGI

3.09ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG815677230

Shape and cutting style on the report: Round brilliant

Certificate IGI LG815677230

Diamond specifications and retailer prices

From £570 GBP
$759 USD
As of October 29, 2026
Save £5,963 GBP (91%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £6,533 GBP at Brilliant Earth · As of October 28, 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 LG815677230 or 815677230. Listed at 24 retailers as of October 28, 2026, with prices from £570 to £6,533, a £5,963 spread on the same certified stone. Brilliant Earth lists it at £6,533. 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 angle34.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815677230
Dimensions9.39 × 9.35 × 5.75 mm
L/W Ratio1.00
Girdle conditionFaceted
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
Top View
9.39 mm9.35 mm3.09 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815677230
Side View
Table 58.0%Crown 34.4°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.4%

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: £6,533 GBP|Low: £570 GBP|High: £7,036 GBP|Avg: £1,924 GBP|-7.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
October 29, 2026
Retailer 16£570 GBP
Retailer 4£890 GBP
Retailer 13£916 GBP
Retailer 2£943 GBP
Retailer 10£962 GBP
Retailer 11£1,372 GBP
Retailer 7£1,375 GBP
Retailer 3£1,499 GBP
Retailer 6£1,501 GBP
Retailer 14£1,603 GBP
Retailer 15£1,912 GBP
Retailer 5£2,039 GBP
Retailer 12£2,043 GBP
Retailer 9£2,503 GBP
Retailer 8£4,333 GBP
Brilliant Earth£6,533 GBP

35 data points across 16 retailers

24 retailers£570 GBP to £6,533 GBP

Retailer 1
-
£526 GBP
$700 USD
Price last confirmed 19 days ago
Retailer 2
-
£541 GBP
$721 USD
View
Price last confirmed 37 days ago
A
Retailer 3
-
£570 GBP
$759 USD
View
Final sale: no returns
Retailer 4
-
£589 GBP
$784 USD
View
Price last confirmed 36 days ago
Retailer 5
-
£610 GBP
$812 USD
View
Price last confirmed 17 days ago
Retailer 6
-
£610 GBP
$812 USD
View
Price last confirmed 27 days ago
Retailer 7
-
£619 GBP
$824 USD
View
Price last confirmed 34 days ago
A
Retailer 8
-
£890 GBP
$1,185 USD
View
A
Retailer 9
-
£916 GBP
$1,220 USD
View
A
Retailer 10
-
£943 GBP
View
A
Retailer 11
-
£962 GBP
€1,220 EUR
View
A
Retailer 12
-
£1,372 GBP
ZAR 29,527 ZAR
View
Retailer 13
-
£1,375 GBP
A$2,817 AUD
View
Price last confirmed 8 days ago
A
Retailer 14
-
£1,499 GBP
$1,996 USD
View
A
Retailer 15
-
£1,501 GBP
$1,999 USD
View
A
Retailer 16
-
£1,603 GBP
$2,135 USD
View
Retailer 17
-
£1,714 GBP
$2,282 USD
View
Price last confirmed 22 days ago
Retailer 18
-
£1,765 GBP
$2,350 USD
View
Price last confirmed 38 days ago
A
Retailer 19
-
£1,912 GBP
$2,546 USD
View
A
Retailer 20
-
£2,039 GBP
$2,715 USD
View
A
Retailer 21
-
£2,043 GBP
$2,721 USD
View
B+
Retailer 22
-
£2,503 GBP
View
Retailer 23
-
£4,333 GBP
$5,770 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
21016998A · Oct 28
£6,533 GBP
$8,700 USD
View
23 more retailers have this diamond
Prices start from £570 GBPSave up to £5,963 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
£570 GBP