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Round|Lab Grown|IGI

3.09ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG815611581

Shape and cutting style on the report: Round brilliant

Certificate IGI LG815611581

Diamond specifications and retailer prices

From £478 GBP
$637 USD
As of October 29, 2026
Save £1,871 GBP (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,310 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

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 LG815611581 or 815611581. Listed at 20 retailers as of October 29, 2026, with a 391% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle34.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815611581
Dimensions9.43 × 9.39 × 5.70 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
9.43 mm9.39 mm3.09 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815611581
Side View
Table 58.0%Crown 34.5°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.6%

Caratlytics Score

How it works →
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: £4,310 GBP|Low: £459 GBP|High: £4,374 GBP|Avg: £1,223 GBP|-1.5%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
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Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 18
October 29, 2026
Retailer 3£478 GBP
Retailer 6£520 GBP
Retailer 9£535 GBP
Retailer 4£555 GBP
Retailer 18£555 GBP
Retailer 12£680 GBP
Retailer 10£785 GBP
Retailer 17£813 GBP
Retailer 14£815 GBP
Retailer 2£880 GBP
Retailer 15£1,260 GBP
Retailer 13£1,288 GBP
Retailer 16£1,416 GBP
Retailer 5£1,559 GBP
Retailer 8£1,892 GBP
Retailer 7£1,943 GBP
Retailer 11£2,349 GBP
Rare Carat£4,310 GBP

43 data points across 18 retailers

20 retailers£478 GBP to £2,349 GBP

A
Cheapest Retailer
-
£478 GBP
$637 USD
A
Retailer 2
-
£520 GBP
$693 USD
View
A
Retailer 3
-
£535 GBP
$713 USD
View
Final sale: no returns
Retailer 4
-
£555 GBP
$739 USD
View
Price last confirmed 13 days ago
A
Retailer 5
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£555 GBP
$739 USD
View
A
Retailer 6
-
£680 GBP
View
A
Retailer 7
-
£785 GBP
$1,046 USD
View
A
Retailer 8
-
£813 GBP
$1,082 USD
View
A
Retailer 9
-
£815 GBP
$1,085 USD
View
A
Retailer 10
-
£880 GBP
View
Retailer 11
-
£1,260 GBP
A$2,581 AUD
View
Price last confirmed 9 days ago
A
Retailer 12
-
£1,288 GBP
ZAR 27,701 ZAR
View
A
Retailer 13
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£1,416 GBP
$1,886 USD
View
A
Retailer 14
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£1,559 GBP
$2,076 USD
View
A
Retailer 15
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£1,592 GBP
$2,120 USD
View
A
Retailer 16
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£1,892 GBP
$2,520 USD
View
A
Retailer 17
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£1,914 GBP
$2,549 USD
View
A
Retailer 18
-
£1,943 GBP
$2,587 USD
View
B+
Retailer 19
-
£2,349 GBP
View
Most Expensive
Rare Carat
VK 4974_l_815611581 · Oct 21
£4,310 GBP
$5,740 USD
View
Price last confirmed 8 days ago
19 more retailers have this diamond
Prices start from £478 GBPSave up to £1,871 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
£478 GBP