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Round|Lab Grown|IGI

1.18ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG440013467

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440013467

Diamond specifications and retailer prices

From £498 GBP
As of November 5, 2026
Save £2,699 GBP (84%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,197 GBP at MOH London · As of November 5, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440013467 or 440013467. Listed at 12 retailers as of November 5, 2026, with prices from £498 to £3,197, a £2,699 spread on the same certified stone. MOH London lists it at £3,197. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.8°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440013467
Dimensions6.89 × 6.93 × 4.08 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.89 mm6.93 mm1.18 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440013467
Side View
Table 57.0%Crown 31.8°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 59.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £3,197 GBP|Low: £498 GBP|High: £3,244 GBP|Avg: £1,502 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 5£498 GBP
Retailer 6£815 GBP
Retailer 10£912 GBP
Retailer 7£945 GBP
Retailer 9£945 GBP
Retailer 11£1,074 GBP
Retailer 12£1,346 GBP
Retailer 8£1,504 GBP
Retailer 2£1,608 GBP
Retailer 3£1,918 GBP
Retailer 4£2,706 GBP
MOH London£3,197 GBP

23 data points across 12 retailers

12 retailers£498 GBP to £3,197 GBP

A
Cheapest Retailer
-
£498 GBP
B+
Retailer 2
-
£815 GBP
View
B+
Retailer 3
-
£886 GBP
View
B+
Retailer 4
-
£912 GBP
View
Final sale: no returns
B+
Retailer 5
-
£945 GBP
View
Retailer 6
-
£945 GBP
View
Price last confirmed 25 days ago
B+
Retailer 7
-
£1,074 GBP
View
B
Retailer 8
-
£1,504 GBP
View
B
Retailer 9
-
£1,608 GBP
View
B
Retailer 10
-
£1,772 GBP
View
B
Retailer 11
-
£1,918 GBP
View
Most Expensive
B
MOH London
LG440013467 · Nov 5
£3,197 GBP
View
11 more retailers have this diamond
Prices start from £498 GBPSave up to £2,699 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
£498 GBP