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Marquise|Lab Grown|IGI

1.00ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG821694324

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG821694324

Diamond specifications and retailer prices

From £220 GBP
As of November 6, 2026
Save £410 GBP (65%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £630 GBP at MOH London · As of November 4, 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 top-tier cut grade and certified by IGI LG821694324 or 821694324. Listed at 6 retailers as of November 4, 2026, with prices from £220 to £630, a £410 spread on the same certified stone. MOH London lists it at £630. 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

1.00
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821694324
Dimensions10.30 × 5.30 × 3.29 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
10.30 mm5.30 mm1.00 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821694324
Side View
Table 61.0%Crown 35.5°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.1%

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 6
Current: £630 GBP|Low: £220 GBP|High: £635 GBP|Avg: £347 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5£220 GBP
Retailer 2£231 GBP
Retailer 4£250 GBP
Retailer 3£256 GBP
Retailer 6£475 GBP
MOH London£630 GBP

28 data points across 6 retailers

6 retailers£220 GBP to £630 GBP

A
Cheapest Retailer
-
£220 GBP
A
Retailer 2
-
£231 GBP
View
A
Retailer 3
-
£250 GBP
View
A
Retailer 4
-
£256 GBP
View
B
Retailer 5
-
£475 GBP
View
Most Expensive
B
MOH London
LG821694324 · Nov 4
£630 GBP
View
5 more retailers have this diamond
Prices start from £220 GBPSave up to £410 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
£220 GBP