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Marquise|Lab Grown|IGI

1.18ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG579399861

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG579399861

Diamond specifications and retailer prices

From £656 GBP
$880 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: £656 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 1.18ct lab-grown marquise diamond

This 1.18ct lab-grown marquise sits in the classic one-carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG579399861 or 579399861. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.18
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG579399861
Dimensions10.49 × 5.54 × 3.47 mm
L/W Ratio1.89
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
10.49 mm5.54 mm1.18 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG579399861
Side View
Table 56.0%Crown 35.9°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 62.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £656 GBP|Low: £656 GBP|High: £723 GBP|Avg: £684 GBP|-4.3%
January 29, 2026
Brilliant Earth£656 GBP

9 data points across 1 retailer

1 retailer

B
Brilliant Earth
13715353B · Nov 2
£656 GBP
$880 USD
View

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B
1.18ct Marquise
£656 GBP