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Round|Lab Grown|IGI

3.09ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG743594170

Shape and cutting style on the report: Round brilliant

Certificate IGI LG743594170

Diamond specifications and retailer prices

From £626 GBP
$839 USD
As of October 29, 2026
Save £6,889 GBP (92%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £7,516 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 LG743594170 or 743594170. Listed at 28 retailers as of October 29, 2026, with prices from £626 to £7,516, a £6,889 spread on the same certified stone. Brilliant Earth lists it at £7,516. 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 angle34.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743594170
Dimensions9.42 × 9.37 × 5.72 mm
L/W Ratio1.01
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
9.42 mm9.37 mm3.09 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743594170
Side View
Table 58.0%Crown 34.2°Girdle: MediumPavilion 40.9°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: £7,516 GBP|Low: £626 GBP|High: £7,516 GBP|Avg: £2,357 GBP
Brilliant Earth
Retailer 2
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Retailer 5
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Retailer 7
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Retailer 16
Retailer 17
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Retailer 21
October 31, 2026
Retailer 3£626 GBP
Retailer 21£681 GBP
Retailer 7£726 GBP
Retailer 13£858 GBP
Retailer 6£959 GBP
Retailer 12£1,202 GBP
Retailer 15£1,220 GBP
Retailer 2£1,276 GBP
Retailer 16£1,663 GBP
Retailer 8£1,670 GBP
Retailer 20£1,809 GBP
Retailer 17£1,861 GBP
Retailer 4£2,253 GBP
Retailer 9£2,272 GBP
Retailer 10£2,390 GBP
Retailer 18£2,733 GBP
Retailer 14£3,821 GBP
Retailer 5£4,097 GBP
Retailer 11£5,560 GBP
Retailer 19£6,981 GBP
Brilliant Earth£7,516 GBP

34 data points across 21 retailers

28 retailers£626 GBP to £7,516 GBP

A
Cheapest Retailer
-
£626 GBP
$839 USD
A
Retailer 2
-
£681 GBP
$913 USD
View
A
Retailer 3
-
£726 GBP
$973 USD
View
A
Retailer 4
-
£792 GBP
$1,061 USD
View
Final sale: no returns
A
Retailer 5
-
£858 GBP
$1,150 USD
View
A
Retailer 6
-
£946 GBP
$1,268 USD
View
Retailer 7
-
£959 GBP
View
Price last confirmed 14 days ago
A
Retailer 8
-
£1,022 GBP
HK$10,700 HKD
View
A
Retailer 9
-
£1,202 GBP
$1,610 USD
View
A
Retailer 10
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£1,220 GBP
View
A
Retailer 11
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£1,276 GBP
€1,628 EUR
View
A
Retailer 12
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£1,383 GBP
$1,853 USD
View
A
Retailer 13
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£1,663 GBP
A$3,428 AUD
View
A
Retailer 14
-
£1,670 GBP
$2,237 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
A
Retailer 17
-
£2,050 GBP
$2,746 USD
View
B+
Retailer 18
-
£2,253 GBP
$3,019 USD
View
B+
Retailer 19
-
£2,272 GBP
$3,044 USD
View
B+
Retailer 20
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£2,390 GBP
$3,203 USD
View
B+
Retailer 21
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£2,733 GBP
View
B+
Retailer 22
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£2,856 GBP
$3,827 USD
View
B+
Retailer 23
-
£2,969 GBP
SGD 5,376 SGD
View
Retailer 24
-
£3,821 GBP
A$7,876 AUD
View
Price last confirmed 28 days ago
Retailer 25
-
£4,097 GBP
$5,490 USD
View
Price last confirmed 13 days ago
B
Retailer 26
-
£5,560 GBP
$7,450 USD
View
B
Retailer 27
-
£6,981 GBP
$9,354 USD
View
Most Expensive
B
Brilliant Earth
18652381Y · Oct 29
£7,516 GBP
$10,070 USD
View
27 more retailers have this diamond
Prices start from £626 GBPSave up to £6,889 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
£626 GBP