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Marquise|Lab Grown|IGI

1.03ct G VVS1 Marquise Lab Grown Diamond

EX • G/VVS1 • IGI LG811677900

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG811677900

Diamond specifications and retailer prices

From £145 GBP
$194 USD
As of November 1, 2026
Save £355 GBP (71%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £500 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.03ct lab-grown marquise diamond

This 1.03ct lab-grown marquise sits in the classic one-carat band, graded G colour (near-colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG811677900 or 811677900. Listed at 3 retailers as of October 28, 2026, with prices from £145 to £500, a £355 spread on the same certified stone. Rare Carat lists it at £500. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
G
Colour
VVS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811677900
Dimensions10.71 × 5.22 × 3.24 mm
L/W Ratio2.05
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.71 mm5.22 mm1.03 ctG / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811677900
Side View
Table 61.0%Crown 35.6°Girdle: THN-MEDPavilion 40.4°Culet: NoneDepth 62.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £500 GBP|Low: £145 GBP|High: £508 GBP|Avg: £318 GBP|-1.5%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 3£145 GBP
Retailer 6£276 GBP
Retailer 5£279 GBP
Retailer 2£298 GBP
Retailer 4£315 GBP
Rare Carat£500 GBP

38 data points across 6 retailers

3 retailers£145 GBP to £500 GBP

A
Cheapest Retailer
-
£145 GBP
$194 USD
Final sale: no returns
A
Retailer 2
-
£298 GBP
View
Most Expensive
B
Rare Carat
811677900 · Oct 28
£500 GBP
$670 USD
View
2 more retailers have this diamond
Prices start from £145 GBPSave up to £355 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
1.03ct Marquise
£145 GBP