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Marquise|Lab Grown|IGI

3.09ct H VS1 Marquise Lab Grown Diamond

EX • H/VS1 • IGI LG818639599

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818639599

Diamond specifications and retailer prices

From £371 GBP
$497 USD
As of October 30, 2026
Save £1,548 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,919 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 3.09ct lab-grown marquise diamond

This 3.09ct lab-grown marquise sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818639599 or 818639599. Listed at 18 retailers as of October 30, 2026, with prices from £371 to £1,919, a £1,548 spread on the same certified stone. MOH London lists it at £1,919. 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
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818639599
Dimensions15.45 × 7.59 × 4.66 mm
L/W Ratio2.04
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.45 mm7.59 mm3.09 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818639599
Side View
Table 62.0%Crown 33.5°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 61.4%

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: Oct 30
Current: £1,919 GBP|Low: £356 GBP|High: £1,966 GBP|Avg: £919 GBP|-2.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
Retailer 18
November 1, 2026
Retailer 6£371 GBP
Retailer 4£415 GBP
Retailer 8£415 GBP
Retailer 18£460 GBP
Retailer 10£464 GBP
Retailer 2£525 GBP
Retailer 17£563 GBP
Retailer 15£714 GBP
Retailer 13£737 GBP
Retailer 5£765 GBP
Retailer 12£971 GBP
Retailer 14£998 GBP
Retailer 11£1,083 GBP
Retailer 3£1,209 GBP
Retailer 7£1,458 GBP
Retailer 16£1,498 GBP
Retailer 9£1,575 GBP
MOH London£1,919 GBP

32 data points across 18 retailers

18 retailers£371 GBP to £1,919 GBP

A
Cheapest Retailer
-
£371 GBP
$497 USD
A
Retailer 2
-
£415 GBP
$556 USD
View
A
Retailer 3
-
£415 GBP
$556 USD
View
Final sale: no returns
A
Retailer 4
-
£460 GBP
$616 USD
View
Retailer 5
-
£464 GBP
$622 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
£525 GBP
View
A
Retailer 7
-
£563 GBP
$755 USD
View
A
Retailer 8
-
£714 GBP
$957 USD
View
A
Retailer 9
-
£737 GBP
$987 USD
View
A
Retailer 10
-
£765 GBP
$1,025 USD
View
A
Retailer 11
-
£971 GBP
A$2,002 AUD
View
A
Retailer 12
-
£998 GBP
ZAR 21,602 ZAR
View
A
Retailer 13
-
£1,083 GBP
$1,451 USD
View
A
Retailer 14
-
£1,209 GBP
$1,620 USD
View
B+
Retailer 15
-
£1,458 GBP
SGD 2,640 SGD
View
B+
Retailer 16
-
£1,498 GBP
$2,007 USD
View
B+
Retailer 17
-
£1,575 GBP
$2,110 USD
View
Most Expensive
B+
MOH London
LG818639599 · Nov 1
£1,919 GBP
View
17 more retailers have this diamond
Prices start from £371 GBPSave up to £1,548 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
£371 GBP