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Marquise|Lab Grown|IGI

0.51ct D VS1 Marquise Lab Grown Diamond

VG • D/VS1 • IGI LG846609021

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG846609021

Diamond specifications and retailer prices

From £175 GBP
$235 USD
As of November 1, 2026
Save £423 GBP (71%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £598 GBP at MOH London · As of October 26, 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 D colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG846609021 or 846609021. Listed at 7 retailers as of October 26, 2026, with prices from £175 to £598, a £423 spread on the same certified stone. MOH London lists it at £598. 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
D
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846609021
Dimensions8.14 × 4.28 × 2.55 mm
L/W Ratio1.90
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.14 mm4.28 mm0.51 ctD / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846609021
Side View
Table 64.0%Crown 34°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 59.6%

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: £598 GBP|Low: £175 GBP|High: £598 GBP|Avg: £356 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 3£175 GBP
Retailer 2£218 GBP
Retailer 5£240 GBP
Retailer 6£296 GBP
Retailer 4£402 GBP
Retailer 7£453 GBP
MOH London£598 GBP

11 data points across 7 retailers

7 retailers£175 GBP to £598 GBP

A
Cheapest Retailer
-
£175 GBP
$235 USD
B+
Retailer 2
-
£218 GBP
View
B+
Retailer 3
-
£240 GBP
$322 USD
View
B
Retailer 4
-
£296 GBP
$397 USD
View
B
Retailer 5
-
£402 GBP
$538 USD
View
B
Retailer 6
-
£453 GBP
$606 USD
View
Most Expensive
B
MOH London
LG846609021 · Oct 26
£598 GBP
View
6 more retailers have this diamond
Prices start from £175 GBPSave up to £423 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
£175 GBP