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Marquise|Lab Grown|IGI

0.50ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG436073156

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436073156

Diamond specifications and retailer prices

From £224 GBP
$300 USD
As of November 2, 2026
Save £888 GBP (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,111 GBP at MOH London · As of October 26, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436073156 or 436073156. Listed at 11 retailers as of October 26, 2026, with prices from £224 to £1,111, a £888 spread on the same certified stone. MOH London lists it at £1,111. 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
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.8°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436073156
Dimensions7.74 × 4.28 × 2.61 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizePointed
Top View
7.74 mm4.28 mm0.50 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436073156
Side View
Table 61.5%Crown 31.8°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.0%

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 2
Current: £1,111 GBP|Low: £215 GBP|High: £1,123 GBP|Avg: £526 GBP|-0.9%
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
October 31, 2026
Retailer 9£224 GBP
Retailer 7£238 GBP
Retailer 3£250 GBP
Retailer 13£259 GBP
Retailer 10£277 GBP
Retailer 14£277 GBP
Retailer 4£395 GBP
Retailer 12£453 GBP
Retailer 2£508 GBP
Retailer 5£547 GBP
Retailer 8£851 GBP
Retailer 11£891 GBP
MOH London£1,111 GBP
Retailer 6£1,113 GBP

24 data points across 14 retailers

11 retailers£224 GBP to £1,111 GBP

A
Cheapest Retailer
-
£224 GBP
$300 USD
A
Retailer 2
-
£238 GBP
$320 USD
View
B+
Retailer 3
-
£250 GBP
$335 USD
View
Final sale: no returns
B+
Retailer 4
-
£259 GBP
$348 USD
View
Retailer 5
-
£277 GBP
$372 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£277 GBP
$372 USD
View
B
Retailer 7
-
£453 GBP
$608 USD
View
B
Retailer 8
-
£508 GBP
€649 EUR
View
B
Retailer 9
-
£851 GBP
$1,142 USD
View
B
Retailer 10
-
£891 GBP
$1,195 USD
View
Most Expensive
B
MOH London
LG436073156 · Oct 26
£1,111 GBP
View
10 more retailers have this diamond
Prices start from £224 GBPSave up to £888 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
£224 GBP