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Round|Lab Grown|IGI

3.09ct G IF Round Lab Grown Diamond

EX • G/IF • IGI LG669421282

Shape and cutting style on the report: Round brilliant

Certificate IGI LG669421282

Diamond specifications and retailer prices

From £575 GBP
$770 USD
As of November 1, 2026
Save £3,836 GBP (87%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,411 GBP at Brilliant Earth · As of October 31, 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 G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG669421282 or 669421282. Listed at 21 retailers as of October 31, 2026, with prices from £575 to £4,411, a £3,836 spread on the same certified stone. Brilliant Earth lists it at £4,411. 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
G
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG669421282
Dimensions9.26 × 9.31 × 5.82 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 Faint Blue
Top View
9.26 mm9.31 mm3.09 ctG / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG669421282
Side View
Table 57.0%Crown 36.5°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.7%

Caratlytics Score

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A
Excellent
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: Nov 1
Current: £4,411 GBP|Low: £552 GBP|High: £6,254 GBP|Avg: £1,632 GBP|-29.5%
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
Retailer 19
Retailer 20
November 1, 2026
Retailer 19£575 GBP
Retailer 10£625 GBP
Retailer 20£643 GBP
Retailer 3£666 GBP
Retailer 11£774 GBP
Retailer 17£799 GBP
Retailer 5£890 GBP
Retailer 7£954 GBP
Retailer 2£1,009 GBP
Retailer 13£1,168 GBP
Retailer 18£1,443 GBP
Retailer 14£1,505 GBP
Retailer 16£1,547 GBP
Retailer 4£1,802 GBP
Retailer 6£1,873 GBP
Retailer 12£2,240 GBP
Retailer 8£2,252 GBP
Retailer 9£2,301 GBP
Retailer 15£2,511 GBP
Brilliant Earth£4,411 GBP

41 data points across 20 retailers

21 retailers£575 GBP to £4,411 GBP

A
Cheapest Retailer
-
£575 GBP
$770 USD
A
Retailer 2
-
£625 GBP
$837 USD
View
A
Retailer 3
-
£643 GBP
$862 USD
View
Final sale: no returns
Retailer 4
-
£666 GBP
$893 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
£666 GBP
$893 USD
View
A
Retailer 6
-
£774 GBP
HK$8,100 HKD
View
A
Retailer 7
-
£799 GBP
$1,070 USD
View
A
Retailer 8
-
£890 GBP
$1,192 USD
View
A
Retailer 9
-
£954 GBP
$1,278 USD
View
A
Retailer 10
-
£1,009 GBP
View
A
Retailer 11
-
£1,168 GBP
€1,490 EUR
View
B+
Retailer 12
-
£1,443 GBP
$1,934 USD
View
B+
Retailer 13
-
£1,505 GBP
A$3,102 AUD
View
B+
Retailer 14
-
£1,547 GBP
ZAR 33,485 ZAR
View
B+
Retailer 15
-
£1,802 GBP
$2,415 USD
View
B+
Retailer 16
-
£1,873 GBP
$2,510 USD
View
B+
Retailer 17
-
£2,240 GBP
SGD 4,055 SGD
View
B+
Retailer 18
-
£2,252 GBP
$3,018 USD
View
B+
Retailer 19
-
£2,301 GBP
$3,083 USD
View
B+
Retailer 20
-
£2,511 GBP
View
Most Expensive
B
Brilliant Earth
15028441A · Oct 31
£4,411 GBP
$5,910 USD
View
20 more retailers have this diamond
Prices start from £575 GBPSave up to £3,836 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
£575 GBP