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Marquise|Lab Grown|IGI

0.75ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG757539651

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG757539651

Diamond specifications and retailer prices

From £338 GBP
$450 USD
As of October 28, 2026
1 retailer carries this diamond
Only listing: £338 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 0.75ct lab-grown marquise diamond

This 0.75ct lab-grown marquise sits in the just-under-one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG757539651 or 757539651. 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

0.75
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG757539651
Dimensions9.89 × 4.68 × 2.85 mm
L/W Ratio2.11
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.89 mm4.68 mm0.75 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG757539651
Side View
Table 59.0%Crown 33.4°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 60.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: £338 GBP|Low: £132 GBP|High: £1,464 GBP|Avg: £432 GBP|-23.7%
Brilliant Earth
Retailer 2
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Retailer 5
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April 14, 2026
Retailer 13£132 GBP
Retailer 5£182 GBP
Retailer 9£254 GBP
Retailer 3£279 GBP
Retailer 8£307 GBP
Retailer 7£310 GBP
Brilliant Earth£338 GBP
Retailer 10£450 GBP
Retailer 12£507 GBP
Retailer 11£543 GBP
Retailer 2£582 GBP
Retailer 6£613 GBP
Retailer 4£1,464 GBP

50 data points across 13 retailers

1 retailer

B
Brilliant Earth
16956258A · Oct 28
£338 GBP
$450 USD
View

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B
0.75ct Marquise
£338 GBP