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Marquise|Lab Grown|IGI

1.55ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG821644339

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG821644339

Diamond specifications and retailer prices

From £192 GBP
$258 USD
As of November 1, 2026
Save £642 GBP (77%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £835 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.55ct lab-grown marquise diamond

This 1.55ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG821644339 or 821644339. Listed at 3 retailers as of November 1, 2026, with prices from £192 to £835, a £642 spread on the same certified stone. Brilliant Earth lists it at £835. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821644339
Dimensions12.04 × 6.20 × 3.80 mm
L/W Ratio1.94
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.04 mm6.20 mm1.55 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821644339
Side View
Table 61.0%Crown 34.6°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £835 GBP|Low: £192 GBP|High: £1,066 GBP|Avg: £535 GBP|-21.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 3£192 GBP
Retailer 6£357 GBP
Retailer 5£379 GBP
Retailer 2£412 GBP
Retailer 4£754 GBP
Brilliant Earth£835 GBP

36 data points across 6 retailers

3 retailers£192 GBP to £835 GBP

A
Cheapest Retailer
-
£192 GBP
$258 USD
Final sale: no returns
A
Retailer 2
-
£412 GBP
View
Most Expensive
B+
Brilliant Earth
21236128A · Nov 2
£835 GBP
$1,120 USD
View
2 more retailers have this diamond
Prices start from £192 GBPSave up to £642 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
1.55ct Marquise
£192 GBP