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Round|Lab Grown|IGI

3.09ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG731581171

Shape and cutting style on the report: Round brilliant

Certificate IGI LG731581171

Diamond specifications and retailer prices

From £691 GBP
$926 USD
As of October 29, 2026
Save £6,862 GBP (91%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £7,553 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731581171 or 731581171. Listed at 27 retailers as of October 29, 2026, with prices from £691 to £7,553, a £6,862 spread on the same certified stone. Brilliant Earth lists it at £7,553. 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
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731581171
Dimensions9.40 × 9.44 × 5.72 mm
L/W Ratio1.00
Girdle conditionFaceted
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
Top View
9.40 mm9.44 mm3.09 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731581171
Side View
Table 57.0%Crown 33.7°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.7%

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: £7,553 GBP|Low: £691 GBP|High: £10,941 GBP|Avg: £2,079 GBP|-31.0%
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
Retailer 17
Retailer 18
October 31, 2026
Retailer 3£691 GBP
Retailer 18£752 GBP
Retailer 15£773 GBP
Retailer 6£802 GBP
Retailer 5£959 GBP
Retailer 8£1,202 GBP
Retailer 16£1,202 GBP
Retailer 11£1,230 GBP
Retailer 14£1,280 GBP
Retailer 2£1,653 GBP
Retailer 7£1,783 GBP
Retailer 17£1,809 GBP
Retailer 12£1,861 GBP
Retailer 4£2,253 GBP
Retailer 10£2,508 GBP
Retailer 13£2,733 GBP
Retailer 9£3,847 GBP
Brilliant Earth£7,553 GBP

31 data points across 18 retailers

27 retailers£691 GBP to £7,553 GBP

A
Cheapest Retailer
-
£691 GBP
$926 USD
A
Retailer 2
-
£752 GBP
$1,007 USD
View
A
Retailer 3
-
£773 GBP
$1,036 USD
View
Final sale: no returns
A
Retailer 4
-
£802 GBP
$1,074 USD
View
Retailer 5
-
£959 GBP
View
Price last confirmed 14 days ago
A
Retailer 6
-
£974 GBP
HK$10,200 HKD
View
A
Retailer 7
-
£1,005 GBP
$1,347 USD
View
A
Retailer 8
-
£1,202 GBP
$1,610 USD
View
A
Retailer 9
-
£1,202 GBP
$1,610 USD
View
A
Retailer 10
-
£1,230 GBP
View
A
Retailer 11
-
£1,280 GBP
€1,633 EUR
View
A
Retailer 12
-
£1,653 GBP
A$3,408 AUD
View
A
Retailer 13
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£1,783 GBP
$2,389 USD
View
A
Retailer 14
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£1,800 GBP
$2,412 USD
View
Retailer 15
-
£1,809 GBP
A$3,728 AUD
View
Price last confirmed 9 days ago
A
Retailer 16
-
£1,861 GBP
ZAR 40,284 ZAR
View
Retailer 17
-
£2,050 GBP
$2,746 USD
View
Price last confirmed 14 days ago
B+
Retailer 18
-
£2,253 GBP
$3,019 USD
View
B+
Retailer 19
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£2,508 GBP
$3,360 USD
View
B+
Retailer 20
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£2,619 GBP
$3,510 USD
View
B+
Retailer 21
-
£2,733 GBP
View
B+
Retailer 22
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£2,787 GBP
$3,734 USD
View
B+
Retailer 23
-
£2,817 GBP
SGD 5,101 SGD
View
B+
Retailer 24
-
£3,027 GBP
$4,056 USD
View
Retailer 25
-
£3,847 GBP
A$7,931 AUD
View
Price last confirmed 26 days ago
B
Retailer 26
-
£7,238 GBP
$9,698 USD
View
Most Expensive
B
Brilliant Earth
15998919A · Oct 29
£7,553 GBP
$10,120 USD
View
26 more retailers have this diamond
Prices start from £691 GBPSave up to £6,862 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
£691 GBP