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Marquise|Lab Grown|IGI

1.00ct F SI1 Marquise Lab Grown Diamond

VG • F/SI1 • IGI LG849619989

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG849619989

Diamond specifications and retailer prices

From £194 GBP
As of November 2, 2026
Save £784 GBP (80%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £979 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1ct lab-grown marquise diamond

This 1ct lab-grown marquise sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG849619989 or 849619989. Listed at 5 retailers as of October 29, 2026, with prices from £194 to £979, a £784 spread on the same certified stone. MOH London lists it at £979. 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

1.00
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG849619989
Dimensions10.55 × 5.09 × 3.23 mm
L/W Ratio2.07
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.55 mm5.09 mm1.00 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG849619989
Side View
Table 62.0%Crown 35.2°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 63.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: £979 GBP|Low: £187 GBP|High: £979 GBP|Avg: £370 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 2£194 GBP
Retailer 4£215 GBP
Retailer 3£221 GBP
Retailer 5£223 GBP
MOH London£979 GBP

9 data points across 5 retailers

5 retailers£194 GBP to £979 GBP

A
Cheapest Retailer
-
£194 GBP
B+
Retailer 2
-
£215 GBP
$289 USD
View
A
Retailer 3
-
£221 GBP
View
B+
Retailer 4
-
£223 GBP
$299 USD
View
Most Expensive
C
MOH London
LG849619989 · Oct 29
£979 GBP
View
4 more retailers have this diamond
Prices start from £194 GBPSave up to £784 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
1.00ct Marquise
£194 GBP