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Marquise|Lab Grown|IGI

3.09ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG839699121

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839699121

Diamond specifications and retailer prices

From £343 GBP
As of November 4, 2026
Save £2,369 GBP (87%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £2,712 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 3.09ct lab-grown marquise diamond

This 3.09ct lab-grown marquise sits in the three to five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG839699121 or 839699121. Listed at 21 retailers as of November 4, 2026, with prices from £343 to £2,712, a £2,369 spread on the same certified stone. Brilliant Earth lists it at £2,712. 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
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839699121
Dimensions14.88 × 7.79 × 4.75 mm
L/W Ratio1.91
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.88 mm7.79 mm3.09 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839699121
Side View
Table 60.0%Crown 32.7°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.0%

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: Nov 4
Current: £2,712 GBP|Low: £343 GBP|High: £2,890 GBP|Avg: £1,036 GBP|-6.2%
Brilliant Earth
Retailer 2
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Retailer 20
November 5, 2026
Retailer 10£343 GBP
Retailer 19£384 GBP
Retailer 3£426 GBP
Retailer 14£484 GBP
Retailer 6£531 GBP
Retailer 8£571 GBP
Retailer 20£648 GBP
Retailer 2£698 GBP
Retailer 11£770 GBP
Retailer 13£899 GBP
Retailer 5£918 GBP
Retailer 18£924 GBP
Retailer 17£1,143 GBP
Retailer 4£1,368 GBP
Retailer 9£1,390 GBP
Retailer 15£1,493 GBP
Retailer 16£1,563 GBP
Retailer 7£1,615 GBP
Retailer 12£1,902 GBP
Brilliant Earth£2,712 GBP

30 data points across 20 retailers

21 retailers£343 GBP to £2,712 GBP

A
Cheapest Retailer
-
£343 GBP
A
Retailer 2
-
£384 GBP
View
A
Retailer 3
-
£426 GBP
View
Retailer 4
-
£445 GBP
View
Price last confirmed 20 days ago
A
Retailer 5
-
£484 GBP
View
A
Retailer 6
-
£531 GBP
View
B+
Retailer 7
-
£571 GBP
View
A
Retailer 8
-
£648 GBP
View
A
Retailer 9
-
£698 GBP
View
Retailer 10
-
£770 GBP
View
Price last confirmed 9 days ago
A
Retailer 11
-
£899 GBP
View
A
Retailer 12
-
£918 GBP
View
A
Retailer 13
-
£924 GBP
View
B+
Retailer 14
-
£1,143 GBP
View
B+
Retailer 15
-
£1,368 GBP
View
B+
Retailer 16
-
£1,390 GBP
View
B+
Retailer 17
-
£1,493 GBP
View
B+
Retailer 18
-
£1,563 GBP
View
B+
Retailer 19
-
£1,615 GBP
View
Retailer 20
-
£1,902 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
21622796A · Nov 4
£2,712 GBP
$3,650 USD
View
20 more retailers have this diamond
Prices start from £343 GBPSave up to £2,369 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 Marquise
£343 GBP