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Round|Lab Grown|IGI

3.09ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG839676250

Shape and cutting style on the report: Round brilliant

Certificate IGI LG839676250

Diamond specifications and retailer prices

From £775 GBP
$1,039 USD
As of October 29, 2026
Save £10,173 GBP (93%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £10,949 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 LG839676250 or 839676250. Listed at 14 retailers as of October 29, 2026, with prices from £775 to £10,949, a £10,173 spread on the same certified stone. Brilliant Earth lists it at £10,949. 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 angle35.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839676250
Dimensions9.34 × 9.29 × 5.75 mm
L/W Ratio1.01
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
9.34 mm9.29 mm3.09 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839676250
Side View
Table 58.0%Crown 35.2°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.8%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: £10,949 GBP|Low: £775 GBP|High: £10,949 GBP|Avg: £2,374 GBP
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
October 31, 2026
Retailer 14£775 GBP
Retailer 13£927 GBP
Retailer 9£959 GBP
Retailer 3£1,149 GBP
Retailer 7£1,149 GBP
Retailer 2£1,223 GBP
Retailer 12£1,261 GBP
Retailer 8£1,787 GBP
Retailer 5£1,858 GBP
Retailer 10£1,866 GBP
Retailer 6£2,448 GBP
Retailer 4£2,696 GBP
Retailer 11£2,739 GBP
Brilliant Earth£10,949 GBP

20 data points across 14 retailers

14 retailers£775 GBP to £10,949 GBP

A+
Cheapest Retailer
-
£775 GBP
$1,039 USD
Final sale: no returns
A
Retailer 2
-
£927 GBP
HK$9,700 HKD
View
A
Retailer 3
-
£959 GBP
View
A
Retailer 4
-
£1,149 GBP
$1,540 USD
View
A
Retailer 5
-
£1,149 GBP
$1,540 USD
View
A
Retailer 6
-
£1,223 GBP
View
A
Retailer 7
-
£1,261 GBP
€1,609 EUR
View
A
Retailer 8
-
£1,787 GBP
$2,395 USD
View
Retailer 9
-
£1,858 GBP
A$3,831 AUD
View
Price last confirmed 9 days ago
A
Retailer 10
-
£1,866 GBP
ZAR 40,385 ZAR
View
B+
Retailer 11
-
£2,448 GBP
$3,280 USD
View
B+
Retailer 12
-
£2,696 GBP
SGD 4,881 SGD
View
B+
Retailer 13
-
£2,739 GBP
View
Most Expensive
B
Brilliant Earth
21813004A · Oct 29
£10,949 GBP
$14,670 USD
View
13 more retailers have this diamond
Prices start from £775 GBPSave up to £10,173 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
£775 GBP