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Marquise|Lab Grown|IGI

1.05ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG807633320

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG807633320

Diamond specifications and retailer prices

From £498 GBP
$670 USD
As of November 4, 2026
1 retailer carries this diamond
Only listing: £498 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 1.05ct lab-grown marquise diamond

This 1.05ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG807633320 or 807633320. Listed at a single retailer as of November 4, 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

1.05
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG807633320
Dimensions10.91 × 5.25 × 3.29 mm
L/W Ratio2.08
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.91 mm5.25 mm1.05 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG807633320
Side View
Table 61.0%Crown 35.5°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 4
Current: £498 GBP|Low: £238 GBP|High: £750 GBP|Avg: £367 GBP|-33.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
July 14, 2026
Retailer 5£238 GBP
Retailer 4£260 GBP
Retailer 2£312 GBP
Retailer 6£363 GBP
Retailer 3£389 GBP
Brilliant Earth£498 GBP

16 data points across 6 retailers

1 retailer

B
Brilliant Earth
20100655A · Nov 4
£498 GBP
$670 USD
View

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.

B
1.05ct Marquise
£498 GBP