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Marquise|Lab Grown|IGI

1.33ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG787660815

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG787660815

Diamond specifications and retailer prices

From £316 GBP
$424 USD
As of November 1, 2026
Save £534 GBP (63%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £850 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.33ct lab-grown marquise diamond

This 1.33ct 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 LG787660815 or 787660815. Listed at 7 retailers as of November 1, 2026, with prices from £316 to £850, a £534 spread on the same certified stone. MOH London lists it at £850. 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

1.33
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787660815
Dimensions11.07 × 5.64 × 3.69 mm
L/W Ratio1.96
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.07 mm5.64 mm1.33 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787660815
Side View
Table 59.0%Crown 37.7°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 65.4%

Caratlytics Score

How it works →
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 1
Current: £850 GBP|Low: £297 GBP|High: £860 GBP|Avg: £482 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 3£316 GBP
Retailer 2£332 GBP
Retailer 6£366 GBP
Retailer 4£424 GBP
Retailer 5£624 GBP
MOH London£850 GBP

30 data points across 6 retailers

7 retailers£316 GBP to £850 GBP

A
Cheapest Retailer
-
£316 GBP
$424 USD
B+
Retailer 2
-
£332 GBP
View
B+
Retailer 3
-
£366 GBP
$491 USD
View
B+
Retailer 4
-
£424 GBP
$569 USD
View
Retailer 5
-
£540 GBP
$725 USD
View
B
Retailer 6
-
£624 GBP
$838 USD
View
Most Expensive
MOH London
LG787660815 · Nov 2
£850 GBP
View
6 more retailers have this diamond
Prices start from £316 GBPSave up to £534 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
1.33ct Marquise
£316 GBP