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Marquise|Lab Grown|IGI

1.56ct G SI1 Marquise Lab Grown Diamond

VG • G/SI1 • IGI LG551214767

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG551214767

Diamond specifications and retailer prices

From £1,588 GBP
As of November 1, 2026
3 retailers carry this diamond
Most expensive: £3,546 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.56ct lab-grown marquise diamond

This 1.56ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG551214767 or 551214767. Listed at 3 retailers as of November 1, 2026. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.56
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG551214767
Dimensions11.23 × 6.20 × 3.96 mm
L/W Ratio1.81
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
11.23 mm6.20 mm1.56 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG551214767
Side View
Table 56.0%Crown 36.5°Girdle: THN-MEDPavilion 40.9°Culet: NoneDepth 63.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 1
Current: £3,546 GBP|Low: £1,151 GBP|High: £4,932 GBP|Avg: £2,514 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 4, 2026
Retailer 5£1,151 GBP
Retailer 2£1,540 GBP
Retailer 4£1,588 GBP
MOH London£3,546 GBP
Retailer 3£4,932 GBP

4 data points across 5 retailers

3 retailers

B
Cheapest Retailer
-
£1,588 GBP
Most Expensive
MOH London
LG551214767 · Nov 1
£3,546 GBP
View
Price under review
1 more retailer has this diamond
Prices start from £1,588 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.

B
1.56ct Marquise
£1,588 GBP