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Marquise|Lab Grown|IGI

3.42ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG756526964

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG756526964

Diamond specifications and retailer prices

From £620 GBP
$831 USD
As of November 1, 2026
Save £824 GBP (57%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,445 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 3.42ct lab-grown marquise diamond

This 3.42ct 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 LG756526964 or 756526964. Listed at 6 retailers as of November 1, 2026, with prices from £620 to £1,445, a £824 spread on the same certified stone. MOH London lists it at £1,445. 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

3.42
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG756526964
Dimensions14.96 × 7.82 × 4.95 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.96 mm7.82 mm3.42 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG756526964
Side View
Table 60.0%Crown 35.6°Girdle: STK-THKPavilion 40.1°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
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: £1,445 GBP|Low: £575 GBP|High: £1,483 GBP|Avg: £923 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4£620 GBP
Retailer 2£643 GBP
Retailer 3£685 GBP
Retailer 5£957 GBP
Retailer 6£1,288 GBP
MOH London£1,445 GBP

43 data points across 6 retailers

6 retailers£620 GBP to £1,445 GBP

B+
Cheapest Retailer
-
£620 GBP
$831 USD
A
Retailer 2
-
£643 GBP
View
A
Retailer 3
-
£685 GBP
$918 USD
View
A
Retailer 4
-
£957 GBP
$1,282 USD
View
B+
Retailer 5
-
£1,288 GBP
$1,726 USD
View
Most Expensive
B+
MOH London
LG756526964 · Nov 1
£1,445 GBP
View
5 more retailers have this diamond
Prices start from £620 GBPSave up to £824 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
3.42ct Marquise
£620 GBP