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Marquise|Lab Grown|IGI

0.50ct G SI1 Marquise Lab Grown Diamond

ID • G/SI1 • IGI LG532257821

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG532257821

Diamond specifications and retailer prices

From £92 GBP
$123 USD
As of November 2, 2026
Save £314 GBP (77%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £947 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.5ct lab-grown marquise diamond

This 0.5ct lab-grown marquise sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG532257821 or 532257821. Listed at 14 retailers as of October 31, 2026, with a 342% 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

0.50
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.4°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG532257821
Dimensions8.32 × 4.17 × 2.46 mm
L/W Ratio2.00
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
8.32 mm4.17 mm0.50 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG532257821
Side View
Table 59.5%Crown 32.4°Girdle: THN-THKPavilion 38.3°Culet: NoneDepth 59.0%

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 2
Current: £947 GBP|Low: £88 GBP|High: £958 GBP|Avg: £280 GBP|-1.0%
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
November 2, 2026
Retailer 9£92 GBP
Retailer 5£102 GBP
Retailer 13£106 GBP
Retailer 3£121 GBP
Retailer 10£121 GBP
Retailer 6£209 GBP
Retailer 12£219 GBP
Retailer 2£233 GBP
Retailer 7£274 GBP
Retailer 4£283 GBP
Retailer 11£364 GBP
Retailer 8£406 GBP
MOH London£947 GBP

44 data points across 13 retailers

14 retailers£92 GBP to £406 GBP

A
Cheapest Retailer
-
£92 GBP
$123 USD
A
Retailer 2
-
£102 GBP
$137 USD
View
Final sale: no returns
A
Retailer 3
-
£106 GBP
$142 USD
View
Retailer 4
-
£121 GBP
$162 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£121 GBP
$162 USD
View
B+
Retailer 6
-
£209 GBP
$280 USD
View
B+
Retailer 7
-
£219 GBP
$293 USD
View
B
Retailer 8
-
£233 GBP
View
B
Retailer 9
-
£274 GBP
View
B
Retailer 10
-
£283 GBP
$379 USD
View
B
Retailer 11
-
£315 GBP
HK$3,300 HKD
View
B
Retailer 12
-
£364 GBP
$488 USD
View
B
Retailer 13
-
£406 GBP
$544 USD
View
Most Expensive
MOH London
LG532257821 · Nov 1
£947 GBP
View
Price under review
13 more retailers have this diamond
Prices start from £92 GBPSave up to £314 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
0.50ct Marquise
£92 GBP