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Marquise|Lab Grown|IGI

1.00ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG766628129

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG766628129

Diamond specifications and retailer prices

From £222 GBP
As of November 6, 2026
Save £422 GBP (66%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £644 GBP at MOH London · As of November 2, 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 LG766628129 or 766628129. Listed at 7 retailers as of November 2, 2026, with prices from £222 to £644, a £422 spread on the same certified stone. MOH London lists it at £644. 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 angle34.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766628129
Dimensions10.63 × 5.14 × 3.22 mm
L/W Ratio2.07
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.63 mm5.14 mm1.00 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766628129
Side View
Table 59.0%Crown 34.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

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: £644 GBP|Low: £222 GBP|High: £652 GBP|Avg: £331 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6£222 GBP
Retailer 2£236 GBP
Retailer 5£253 GBP
Retailer 3£261 GBP
Retailer 4£376 GBP
MOH London£644 GBP

32 data points across 6 retailers

7 retailers£222 GBP to £644 GBP

A
Cheapest Retailer
-
£222 GBP
A
Retailer 2
-
£236 GBP
View
A
Retailer 3
-
£253 GBP
View
A
Retailer 4
-
£261 GBP
View
B+
Retailer 5
-
£376 GBP
View
B
Retailer 6
-
£484 GBP
View
Most Expensive
B
MOH London
LG766628129 · Nov 2
£644 GBP
View
6 more retailers have this diamond
Prices start from £222 GBPSave up to £422 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
£222 GBP