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Marquise|Lab Grown|IGI

0.73ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG623459056

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG623459056

Diamond specifications and retailer prices

From £330 GBP
$440 USD
As of October 28, 2026
1 retailer carries this diamond
Only listing: £330 GBP at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 0.73ct lab-grown marquise diamond

This 0.73ct 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 LG623459056 or 623459056. Listed at a single retailer as of October 28, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

0.73
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623459056
Dimensions9.54 × 4.66 × 2.93 mm
L/W Ratio2.05
Girdle conditionFaceted
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
9.54 mm4.66 mm0.73 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623459056
Side View
Table 59.0%Crown 35.4°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.9%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 28
Current: £330 GBP|Low: £188 GBP|High: £330 GBP|Avg: £267 GBP
Brilliant Earth
Retailer 2
December 30, 2025
Retailer 2£188 GBP
Brilliant Earth£330 GBP

5 data points across 2 retailers

1 retailer

B+
Brilliant Earth
15280908Y · Oct 28
£330 GBP
$440 USD
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B+
0.73ct Marquise
£330 GBP