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Marquise|Lab Grown|IGI

3.51ct I VS1 Marquise Lab Grown Diamond

ID • I/VS1 • IGI LG836677130

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG836677130

Diamond specifications and retailer prices

From £515 GBP
$691 USD
As of November 1, 2026
Save £734 GBP (59%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,249 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 3.51ct lab-grown marquise diamond

This 3.51ct lab-grown marquise sits in the three to five carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG836677130 or 836677130. Listed at 5 retailers as of November 1, 2026, with prices from £515 to £1,249, a £734 spread on the same certified stone. MOH London lists it at £1,249. 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

3.51
Carat
I
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.1°
Pavilion angle42°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836677130
Dimensions15.72 × 7.93 × 5.02 mm
L/W Ratio1.98
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.72 mm7.93 mm3.51 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836677130
Side View
Table 60.0%Crown 31.1°Girdle: MED-STKPavilion 42°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: £1,249 GBP|Low: £515 GBP|High: £1,262 GBP|Avg: £835 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 4£515 GBP
Retailer 3£625 GBP
Retailer 2£744 GBP
Retailer 5£1,059 GBP
MOH London£1,249 GBP

6 data points across 5 retailers

5 retailers£515 GBP to £1,249 GBP

B+
Cheapest Retailer
-
£515 GBP
$691 USD
A
Retailer 2
-
£625 GBP
$839 USD
View
A
Retailer 3
-
£744 GBP
$999 USD
View
A
Retailer 4
-
£1,059 GBP
$1,421 USD
View
Most Expensive
A
MOH London
LG836677130 · Nov 1
£1,249 GBP
View
4 more retailers have this diamond
Prices start from £515 GBPSave up to £734 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
3.51ct Marquise
£515 GBP