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Marquise|Lab Grown|IGI

0.51ct G VS1 Marquise Lab Grown Diamond

VG • G/VS1 • IGI LG823640318

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG823640318

Diamond specifications and retailer prices

From £163 GBP
As of November 1, 2026
Save £711 GBP (81%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £874 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 0.51ct lab-grown marquise diamond

This 0.51ct lab-grown marquise sits in the half to three-quarter carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG823640318 or 823640318. Listed at 7 retailers as of November 1, 2026, with prices from £163 to £874, a £711 spread on the same certified stone. MOH London lists it at £874. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
G
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.9°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823640318
Dimensions8.21 × 4.28 × 2.54 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
8.21 mm4.28 mm0.51 ctG / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823640318
Side View
Table 64.0%Crown 38.9°Girdle: MED-STKPavilion 38.9°Culet: NoneDepth 59.3%

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 1
Current: £874 GBP|Low: £163 GBP|High: £886 GBP|Avg: £336 GBP|+1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4£163 GBP
Retailer 7£205 GBP
Retailer 2£210 GBP
Retailer 3£253 GBP
Retailer 6£275 GBP
Retailer 5£380 GBP
MOH London£874 GBP

32 data points across 7 retailers

7 retailers£163 GBP to £874 GBP

A
Cheapest Retailer
-
£163 GBP
B+
Retailer 2
-
£205 GBP
View
B+
Retailer 3
-
£210 GBP
View
B+
Retailer 4
-
£253 GBP
View
B+
Retailer 5
-
£275 GBP
View
B
Retailer 6
-
£380 GBP
View
Most Expensive
B
MOH London
LG823640318 · Nov 5
£874 GBP
View
6 more retailers have this diamond
Prices start from £163 GBPSave up to £711 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
0.51ct Marquise
£163 GBP