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Marquise|Lab Grown|IGI

1.37ct F SI1 Marquise Lab Grown Diamond

EX • F/SI1 • IGI LG797645056

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG797645056

Diamond specifications and retailer prices

From £127 GBP
$171 USD
As of November 2, 2026
Save £610 GBP (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £737 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.37ct lab-grown marquise diamond

This 1.37ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG797645056 or 797645056. Listed at 10 retailers as of November 1, 2026, with prices from £127 to £737, a £610 spread on the same certified stone. MOH London lists it at £737. 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

1.37
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG797645056
Dimensions11.39 × 5.90 × 3.63 mm
L/W Ratio1.93
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.39 mm5.90 mm1.37 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG797645056
Side View
Table 60.0%Crown 34.7°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £737 GBP|Low: £122 GBP|High: £747 GBP|Avg: £460 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 7£127 GBP
Retailer 5£206 GBP
Retailer 2£273 GBP
Retailer 10£274 GBP
Retailer 9£404 GBP
Retailer 6£536 GBP
Retailer 3£554 GBP
Retailer 11£560 GBP
Retailer 4£563 GBP
Retailer 8£641 GBP
MOH London£737 GBP

27 data points across 11 retailers

10 retailers£127 GBP to £737 GBP

A
Cheapest Retailer
-
£127 GBP
$171 USD
A
Retailer 2
-
£148 GBP
$198 USD
View
Retailer 3
-
£206 GBP
View
Price last confirmed 16 days ago
Retailer 4
-
£273 GBP
€349 EUR
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£404 GBP
$542 USD
View
B
Retailer 6
-
£507 GBP
$681 USD
View
B
Retailer 7
-
£536 GBP
$719 USD
View
B
Retailer 8
-
£563 GBP
$755 USD
View
Retailer 9
-
£641 GBP
SGD 1,163 SGD
View
Price last confirmed 20 days ago
Most Expensive
B
MOH London
LG797645056 · Nov 1
£737 GBP
View
9 more retailers have this diamond
Prices start from £127 GBPSave up to £610 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
1.37ct Marquise
£127 GBP