CaratHunter
Plans
Marquise|Lab Grown|IGI

0.51ct H VS1 Marquise Lab Grown Diamond

ID • H/VS1 • IGI LG436045412

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436045412

Diamond specifications and retailer prices

From £249 GBP
As of November 4, 2026
Save £984 GBP (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,233 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 H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG436045412 or 436045412. Listed at 14 retailers as of November 4, 2026, with prices from £249 to £1,233, a £984 spread on the same certified stone. MOH London lists it at £1,233. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.2°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045412
Dimensions7.86 × 4.35 × 2.61 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
7.86 mm4.35 mm0.51 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436045412
Side View
Table 62.5%Crown 32.2°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 60.0%

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 4
Current: £1,233 GBP|Low: £239 GBP|High: £1,252 GBP|Avg: £650 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 5, 2026
Retailer 12£249 GBP
Retailer 13£274 GBP
Retailer 4£278 GBP
Retailer 17£289 GBP
Retailer 3£309 GBP
Retailer 14£309 GBP
Retailer 6£356 GBP
Retailer 16£499 GBP
Retailer 2£558 GBP
Retailer 10£560 GBP
Retailer 7£588 GBP
Retailer 11£905 GBP
Retailer 15£993 GBP
Retailer 5£1,127 GBP
Retailer 8£1,196 GBP
MOH London£1,233 GBP
Retailer 9£1,239 GBP

29 data points across 17 retailers

14 retailers£249 GBP to £1,233 GBP

A
Cheapest Retailer
-
£249 GBP
B+
Retailer 2
-
£274 GBP
View
B+
Retailer 3
-
£278 GBP
View
Final sale: no returns
B+
Retailer 4
-
£289 GBP
View
Retailer 5
-
£309 GBP
View
Price last confirmed 11 days ago
B+
Retailer 6
-
£309 GBP
View
B
Retailer 7
-
£499 GBP
View
B
Retailer 8
-
£558 GBP
View
B
Retailer 9
-
£560 GBP
View
B
Retailer 10
-
£905 GBP
View
B
Retailer 11
-
£993 GBP
View
B
Retailer 12
-
£1,127 GBP
View
B
Retailer 13
-
£1,196 GBP
View
Most Expensive
B
MOH London
LG436045412 · Nov 5
£1,233 GBP
View
13 more retailers have this diamond
Prices start from £249 GBPSave up to £984 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
£249 GBP