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Marquise|Lab Grown|IGI

3.40ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG846632989

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG846632989

Diamond specifications and retailer prices

From £328 GBP
$440 USD
As of November 1, 2026
Save £1,605 GBP (83%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,933 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 3.4ct lab-grown marquise diamond

This 3.4ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG846632989 or 846632989. Listed at 3 retailers as of October 28, 2026, with prices from £328 to £1,933, a £1,605 spread on the same certified stone. Rare Carat lists it at £1,933. 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

3.40
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846632989
Dimensions15.06 × 7.83 × 4.94 mm
L/W Ratio1.92
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.06 mm7.83 mm3.40 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846632989
Side View
Table 63.0%Crown 36.6°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 63.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £1,933 GBP|Low: £328 GBP|High: £1,933 GBP|Avg: £959 GBP
Rare Carat
Retailer 2
Retailer 3
November 1, 2026
Retailer 3£328 GBP
Retailer 2£621 GBP
Rare Carat£1,933 GBP

12 data points across 3 retailers

3 retailers£328 GBP to £1,933 GBP

A
Cheapest Retailer
-
£328 GBP
$440 USD
Final sale: no returns
A
Retailer 2
-
£621 GBP
View
Most Expensive
B
Rare Carat
846632989 · Oct 28
£1,933 GBP
$2,590 USD
View
2 more retailers have this diamond
Prices start from £328 GBPSave up to £1,605 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
3.40ct Marquise
£328 GBP