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Marquise|Lab Grown|IGI

0.51ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG542212263

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG542212263

Diamond specifications and retailer prices

From £93 GBP
$124 USD
As of October 27, 2026
Save £622 GBP (87%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £972 GBP at MOH London · As of October 29, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG542212263 or 542212263. Listed at 16 retailers as of October 27, 2026, with a 668% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG542212263
Dimensions8.94 × 4.17 × 2.47 mm
L/W Ratio2.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.94 mm4.17 mm0.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG542212263
Side View
Table 64.0%Crown 30.2°Girdle: MED-STKPavilion 41°Culet: NoneDepth 59.2%

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: Oct 27
Current: £972 GBP|Low: £55 GBP|High: £978 GBP|Avg: £290 GBP|+0.4%
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
October 29, 2026
Retailer 8£55 GBP
Retailer 11£93 GBP
Retailer 7£104 GBP
Retailer 16£108 GBP
Retailer 3£123 GBP
Retailer 13£123 GBP
Retailer 12£218 GBP
Retailer 14£222 GBP
Retailer 2£240 GBP
Retailer 9£279 GBP
Retailer 4£287 GBP
Retailer 15£372 GBP
Retailer 10£393 GBP
Retailer 5£415 GBP
Retailer 6£715 GBP
MOH London£972 GBP

42 data points across 16 retailers

16 retailers£93 GBP to £715 GBP

A
Cheapest Retailer
-
£93 GBP
$124 USD
A
Retailer 2
-
£104 GBP
$139 USD
View
Final sale: no returns
A
Retailer 3
-
£108 GBP
$144 USD
View
A
Retailer 4
-
£123 GBP
$164 USD
View
A
Retailer 5
-
£123 GBP
$164 USD
View
B+
Retailer 6
-
£218 GBP
$290 USD
View
B+
Retailer 7
-
£222 GBP
$295 USD
View
B+
Retailer 8
-
£240 GBP
View
B+
Retailer 9
-
£250 GBP
HK$2,600 HKD
View
B+
Retailer 10
-
£279 GBP
View
B
Retailer 11
-
£287 GBP
$382 USD
View
B
Retailer 12
-
£372 GBP
$495 USD
View
B
Retailer 13
-
£393 GBP
$523 USD
View
B
Retailer 14
-
£415 GBP
$552 USD
View
B
Retailer 15
-
£715 GBP
$952 USD
View
Most Expensive
B
MOH London
LG542212263 · Oct 29
£972 GBP
View
Price under review
15 more retailers have this diamond
Prices start from £93 GBPSave up to £622 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
£93 GBP