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Round|Lab Grown|IGI

1.18ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG725511084

Shape and cutting style on the report: Round brilliant

Certificate IGI LG725511084

Diamond specifications and retailer prices

From £264 GBP
As of November 6, 2026
Save £133 GBP (33%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £732 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.18ct lab-grown round diamond

This 1.18ct lab-grown round 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 LG725511084 or 725511084. Listed at 7 retailers as of November 6, 2026, with a 50% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.18
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG725511084
Dimensions6.80 × 6.77 × 4.18 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.80 mm6.77 mm1.18 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG725511084
Side View
Table 57.0%Crown 35°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 61.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £732 GBP|Low: £230 GBP|High: £740 GBP|Avg: £360 GBP|+1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£264 GBP
Retailer 6£267 GBP
Retailer 3£274 GBP
Retailer 7£280 GBP
Retailer 4£284 GBP
Retailer 5£397 GBP
MOH London£732 GBP

37 data points across 7 retailers

7 retailers£264 GBP to £397 GBP

A
Cheapest Retailer
-
£264 GBP
A
Retailer 2
-
£267 GBP
View
A
Retailer 3
-
£274 GBP
View
A
Retailer 4
-
£280 GBP
View
A
Retailer 5
-
£284 GBP
View
B
Retailer 6
-
£397 GBP
View
Most Expensive
MOH London
LG725511084 · Oct 26
£732 GBP
View
Price last confirmed 11 days ago
6 more retailers have this diamond
Prices start from £264 GBPSave up to £133 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
1.18ct Round
£264 GBP